31356440

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{181}}^1$

素因数の和:324

約数の個数: 64

約数和(自身を含む): 73120320

約数和(自身を除く): 41763880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 71, 122, 142, 181, 244, 284, 305, 355, 362, 488, 568, 610, 710, 724, 905, 1220, 1420, 1448, 1810, 2440, 2840, 3620, 4331, 7240, 8662, 11041, 12851, 17324, 21655, 22082, 25702, 34648, 43310, 44164, 51404, 55205, 64255, 86620, 88328, 102808, 110410, 128510, 173240, 220820, 257020, 441640, 514040, 783911, 1567822, 3135644, 3919555, 6271288, 7839110, 15678220, 31356440]

約数ペア:

[(1, 31356440), (2, 15678220), (4, 7839110), (5, 6271288), (8, 3919555), (10, 3135644), (20, 1567822), (40, 783911), (61, 514040), (71, 441640), (122, 257020), (142, 220820), (181, 173240), (244, 128510), (284, 110410), (305, 102808), (355, 88328), (362, 86620), (488, 64255), (568, 55205), (610, 51404), (710, 44164), (724, 43310), (905, 34648), (1220, 25702), (1420, 22082), (1448, 21655), (1810, 17324), (2440, 12851), (2840, 11041), (3620, 8662), (4331, 7240)]