256476640

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{83}}^1\times {\mathrm{89}}^1$

素因数の和:225

約数の個数: 192

約数和(自身を含む): 731566080

約数和(自身を除く): 475089440

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 31, 32, 35, 40, 56, 62, 70, 80, 83, 89, 112, 124, 140, 155, 160, 166, 178, 217, 224, 248, 280, 310, 332, 356, 415, 434, 445, 496, 560, 581, 620, 623, 664, 712, 830, 868, 890, 992, 1085, 1120, 1162, 1240, 1246, 1328, 1424, 1660, 1736, 1780, 2170, 2324, 2480, 2492, 2573, 2656, 2759, 2848, 2905, 3115, 3320, 3472, 3560, 4340, 4648, 4960, 4984, 5146, 5518, 5810, 6230, 6640, 6944, 7120, 7387, 8680, 9296, 9968, 10292, 11036, 11620, 12460, 12865, 13280, 13795, 14240, 14774, 17360, 18011, 18592, 19313, 19936, 20584, 22072, 23240, 24920, 25730, 27590, 29548, 34720, 36022, 36935, 38626, 41168, 44144, 46480, 49840, 51460, 51709, 55180, 59096, 72044, 73870, 77252, 82336, 88288, 90055, 92960, 96565, 99680, 102920, 103418, 110360, 118192, 144088, 147740, 154504, 180110, 193130, 205840, 206836, 220720, 228997, 236384, 258545, 288176, 295480, 309008, 360220, 386260, 411680, 413672, 441440, 457994, 517090, 576352, 590960, 618016, 720440, 772520, 827344, 915988, 1034180, 1144985, 1181920, 1440880, 1545040, 1602979, 1654688, 1831976, 2068360, 2289970, 2881760, 3090080, 3205958, 3663952, 4136720, 4579940, 6411916, 7327904, 8014895, 8273440, 9159880, 12823832, 16029790, 18319760, 25647664, 32059580, 36639520, 51295328, 64119160, 128238320, 256476640]

約数ペア:

[(1, 256476640), (2, 128238320), (4, 64119160), (5, 51295328), (7, 36639520), (8, 32059580), (10, 25647664), (14, 18319760), (16, 16029790), (20, 12823832), (28, 9159880), (31, 8273440), (32, 8014895), (35, 7327904), (40, 6411916), (56, 4579940), (62, 4136720), (70, 3663952), (80, 3205958), (83, 3090080), (89, 2881760), (112, 2289970), (124, 2068360), (140, 1831976), (155, 1654688), (160, 1602979), (166, 1545040), (178, 1440880), (217, 1181920), (224, 1144985), (248, 1034180), (280, 915988), (310, 827344), (332, 772520), (356, 720440), (415, 618016), (434, 590960), (445, 576352), (496, 517090), (560, 457994), (581, 441440), (620, 413672), (623, 411680), (664, 386260), (712, 360220), (830, 309008), (868, 295480), (890, 288176), (992, 258545), (1085, 236384), (1120, 228997), (1162, 220720), (1240, 206836), (1246, 205840), (1328, 193130), (1424, 180110), (1660, 154504), (1736, 147740), (1780, 144088), (2170, 118192), (2324, 110360), (2480, 103418), (2492, 102920), (2573, 99680), (2656, 96565), (2759, 92960), (2848, 90055), (2905, 88288), (3115, 82336), (3320, 77252), (3472, 73870), (3560, 72044), (4340, 59096), (4648, 55180), (4960, 51709), (4984, 51460), (5146, 49840), (5518, 46480), (5810, 44144), (6230, 41168), (6640, 38626), (6944, 36935), (7120, 36022), (7387, 34720), (8680, 29548), (9296, 27590), (9968, 25730), (10292, 24920), (11036, 23240), (11620, 22072), (12460, 20584), (12865, 19936), (13280, 19313), (13795, 18592), (14240, 18011), (14774, 17360)]