261687680

素因数分解:

$2^7\times 5^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{257}}^1$

素因数の和:356

約数の個数: 128

約数和(自身を含む): 660005280

約数和(自身を除く): 398317600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 37, 40, 43, 64, 74, 80, 86, 128, 148, 160, 172, 185, 215, 257, 296, 320, 344, 370, 430, 514, 592, 640, 688, 740, 860, 1028, 1184, 1285, 1376, 1480, 1591, 1720, 2056, 2368, 2570, 2752, 2960, 3182, 3440, 4112, 4736, 5140, 5504, 5920, 6364, 6880, 7955, 8224, 9509, 10280, 11051, 11840, 12728, 13760, 15910, 16448, 19018, 20560, 22102, 23680, 25456, 27520, 31820, 32896, 38036, 41120, 44204, 47545, 50912, 55255, 63640, 76072, 82240, 88408, 95090, 101824, 110510, 127280, 152144, 164480, 176816, 190180, 203648, 221020, 254560, 304288, 353632, 380360, 408887, 442040, 509120, 608576, 707264, 760720, 817774, 884080, 1018240, 1217152, 1414528, 1521440, 1635548, 1768160, 2044435, 3042880, 3271096, 3536320, 4088870, 6085760, 6542192, 7072640, 8177740, 13084384, 16355480, 26168768, 32710960, 52337536, 65421920, 130843840, 261687680]

約数ペア:

[(1, 261687680), (2, 130843840), (4, 65421920), (5, 52337536), (8, 32710960), (10, 26168768), (16, 16355480), (20, 13084384), (32, 8177740), (37, 7072640), (40, 6542192), (43, 6085760), (64, 4088870), (74, 3536320), (80, 3271096), (86, 3042880), (128, 2044435), (148, 1768160), (160, 1635548), (172, 1521440), (185, 1414528), (215, 1217152), (257, 1018240), (296, 884080), (320, 817774), (344, 760720), (370, 707264), (430, 608576), (514, 509120), (592, 442040), (640, 408887), (688, 380360), (740, 353632), (860, 304288), (1028, 254560), (1184, 221020), (1285, 203648), (1376, 190180), (1480, 176816), (1591, 164480), (1720, 152144), (2056, 127280), (2368, 110510), (2570, 101824), (2752, 95090), (2960, 88408), (3182, 82240), (3440, 76072), (4112, 63640), (4736, 55255), (5140, 50912), (5504, 47545), (5920, 44204), (6364, 41120), (6880, 38036), (7955, 32896), (8224, 31820), (9509, 27520), (10280, 25456), (11051, 23680), (11840, 22102), (12728, 20560), (13760, 19018), (15910, 16448)]