20839400320

素因数分解:

$2^7\times 5^1\times {\mathrm{31}}^3\times {\mathrm{1093}}^1$

素因数の和:1205

約数の個数: 128

約数和(自身を含む): 51526874880

約数和(自身を除く): 30687474560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 128, 155, 160, 248, 310, 320, 496, 620, 640, 961, 992, 1093, 1240, 1922, 1984, 2186, 2480, 3844, 3968, 4372, 4805, 4960, 5465, 7688, 8744, 9610, 9920, 10930, 15376, 17488, 19220, 19840, 21860, 29791, 30752, 33883, 34976, 38440, 43720, 59582, 61504, 67766, 69952, 76880, 87440, 119164, 123008, 135532, 139904, 148955, 153760, 169415, 174880, 238328, 271064, 297910, 307520, 338830, 349760, 476656, 542128, 595820, 615040, 677660, 699520, 953312, 1050373, 1084256, 1191640, 1355320, 1906624, 2100746, 2168512, 2383280, 2710640, 3813248, 4201492, 4337024, 4766560, 5251865, 5421280, 8402984, 9533120, 10503730, 10842560, 16805968, 19066240, 21007460, 21685120, 32561563, 33611936, 42014920, 65123126, 67223872, 84029840, 130246252, 134447744, 162807815, 168059680, 260492504, 325615630, 336119360, 520985008, 651231260, 672238720, 1041970016, 1302462520, 2083940032, 2604925040, 4167880064, 5209850080, 10419700160, 20839400320]

約数ペア:

[(1, 20839400320), (2, 10419700160), (4, 5209850080), (5, 4167880064), (8, 2604925040), (10, 2083940032), (16, 1302462520), (20, 1041970016), (31, 672238720), (32, 651231260), (40, 520985008), (62, 336119360), (64, 325615630), (80, 260492504), (124, 168059680), (128, 162807815), (155, 134447744), (160, 130246252), (248, 84029840), (310, 67223872), (320, 65123126), (496, 42014920), (620, 33611936), (640, 32561563), (961, 21685120), (992, 21007460), (1093, 19066240), (1240, 16805968), (1922, 10842560), (1984, 10503730), (2186, 9533120), (2480, 8402984), (3844, 5421280), (3968, 5251865), (4372, 4766560), (4805, 4337024), (4960, 4201492), (5465, 3813248), (7688, 2710640), (8744, 2383280), (9610, 2168512), (9920, 2100746), (10930, 1906624), (15376, 1355320), (17488, 1191640), (19220, 1084256), (19840, 1050373), (21860, 953312), (29791, 699520), (30752, 677660), (33883, 615040), (34976, 595820), (38440, 542128), (43720, 476656), (59582, 349760), (61504, 338830), (67766, 307520), (69952, 297910), (76880, 271064), (87440, 238328), (119164, 174880), (123008, 169415), (135532, 153760), (139904, 148955)]