261332480

素因数分解:

$2^9\times 5^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{89}}^1$

素因数の和:180

約数の個数: 160

約数和(自身を含む): 671742720

約数和(自身を除く): 410410240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 37, 40, 62, 64, 74, 80, 89, 124, 128, 148, 155, 160, 178, 185, 248, 256, 296, 310, 320, 356, 370, 445, 496, 512, 592, 620, 640, 712, 740, 890, 992, 1147, 1184, 1240, 1280, 1424, 1480, 1780, 1984, 2294, 2368, 2480, 2560, 2759, 2848, 2960, 3293, 3560, 3968, 4588, 4736, 4960, 5518, 5696, 5735, 5920, 6586, 7120, 7936, 9176, 9472, 9920, 11036, 11392, 11470, 11840, 13172, 13795, 14240, 15872, 16465, 18352, 18944, 19840, 22072, 22784, 22940, 23680, 26344, 27590, 28480, 32930, 36704, 39680, 44144, 45568, 45880, 47360, 52688, 55180, 56960, 65860, 73408, 79360, 88288, 91760, 94720, 102083, 105376, 110360, 113920, 131720, 146816, 176576, 183520, 204166, 210752, 220720, 227840, 263440, 293632, 353152, 367040, 408332, 421504, 441440, 510415, 526880, 587264, 706304, 734080, 816664, 843008, 882880, 1020830, 1053760, 1412608, 1468160, 1633328, 1686016, 1765760, 2041660, 2107520, 2936320, 3266656, 3531520, 4083320, 4215040, 6533312, 7063040, 8166640, 8430080, 13066624, 16333280, 26133248, 32666560, 52266496, 65333120, 130666240, 261332480]

約数ペア:

[(1, 261332480), (2, 130666240), (4, 65333120), (5, 52266496), (8, 32666560), (10, 26133248), (16, 16333280), (20, 13066624), (31, 8430080), (32, 8166640), (37, 7063040), (40, 6533312), (62, 4215040), (64, 4083320), (74, 3531520), (80, 3266656), (89, 2936320), (124, 2107520), (128, 2041660), (148, 1765760), (155, 1686016), (160, 1633328), (178, 1468160), (185, 1412608), (248, 1053760), (256, 1020830), (296, 882880), (310, 843008), (320, 816664), (356, 734080), (370, 706304), (445, 587264), (496, 526880), (512, 510415), (592, 441440), (620, 421504), (640, 408332), (712, 367040), (740, 353152), (890, 293632), (992, 263440), (1147, 227840), (1184, 220720), (1240, 210752), (1280, 204166), (1424, 183520), (1480, 176576), (1780, 146816), (1984, 131720), (2294, 113920), (2368, 110360), (2480, 105376), (2560, 102083), (2759, 94720), (2848, 91760), (2960, 88288), (3293, 79360), (3560, 73408), (3968, 65860), (4588, 56960), (4736, 55180), (4960, 52688), (5518, 47360), (5696, 45880), (5735, 45568), (5920, 44144), (6586, 39680), (7120, 36704), (7936, 32930), (9176, 28480), (9472, 27590), (9920, 26344), (11036, 23680), (11392, 22940), (11470, 22784), (11840, 22072), (13172, 19840), (13795, 18944), (14240, 18352), (15872, 16465)]