21477882280

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{367}}^1\times {\mathrm{967}}^1$

素因数の和:1451

約数の個数: 128

約数和(自身を含む): 51937459200

約数和(自身を除く): 30459576920

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 89, 136, 170, 178, 340, 356, 367, 445, 680, 712, 734, 890, 967, 1468, 1513, 1780, 1835, 1934, 2936, 3026, 3560, 3670, 3868, 4835, 6052, 6239, 7340, 7565, 7736, 9670, 12104, 12478, 14680, 15130, 16439, 19340, 24956, 30260, 31195, 32663, 32878, 38680, 49912, 60520, 62390, 65326, 65756, 82195, 86063, 124780, 130652, 131512, 163315, 164390, 172126, 249560, 261304, 326630, 328780, 344252, 354889, 430315, 555271, 653260, 657560, 688504, 709778, 860630, 1110542, 1306520, 1419556, 1463071, 1721260, 1774445, 2221084, 2776355, 2839112, 2926142, 3442520, 3548890, 4442168, 5552710, 5852284, 6033113, 7097780, 7315355, 11105420, 11704568, 12066226, 14195560, 14630710, 22210840, 24132452, 29261420, 30165565, 31585121, 48264904, 58522840, 60331130, 63170242, 120662260, 126340484, 157925605, 241324520, 252680968, 315851210, 536947057, 631702420, 1073894114, 1263404840, 2147788228, 2684735285, 4295576456, 5369470570, 10738941140, 21477882280]

約数ペア:

[(1, 21477882280), (2, 10738941140), (4, 5369470570), (5, 4295576456), (8, 2684735285), (10, 2147788228), (17, 1263404840), (20, 1073894114), (34, 631702420), (40, 536947057), (68, 315851210), (85, 252680968), (89, 241324520), (136, 157925605), (170, 126340484), (178, 120662260), (340, 63170242), (356, 60331130), (367, 58522840), (445, 48264904), (680, 31585121), (712, 30165565), (734, 29261420), (890, 24132452), (967, 22210840), (1468, 14630710), (1513, 14195560), (1780, 12066226), (1835, 11704568), (1934, 11105420), (2936, 7315355), (3026, 7097780), (3560, 6033113), (3670, 5852284), (3868, 5552710), (4835, 4442168), (6052, 3548890), (6239, 3442520), (7340, 2926142), (7565, 2839112), (7736, 2776355), (9670, 2221084), (12104, 1774445), (12478, 1721260), (14680, 1463071), (15130, 1419556), (16439, 1306520), (19340, 1110542), (24956, 860630), (30260, 709778), (31195, 688504), (32663, 657560), (32878, 653260), (38680, 555271), (49912, 430315), (60520, 354889), (62390, 344252), (65326, 328780), (65756, 326630), (82195, 261304), (86063, 249560), (124780, 172126), (130652, 164390), (131512, 163315)]