20164996840

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{491}}^1\times {\mathrm{14461}}^1$

素因数の和:15034

約数の個数: 64

約数和(自身を含む): 46107169920

約数和(自身を除く): 25942173080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 491, 568, 710, 982, 1420, 1964, 2455, 2840, 3928, 4910, 9820, 14461, 19640, 28922, 34861, 57844, 69722, 72305, 115688, 139444, 144610, 174305, 278888, 289220, 348610, 578440, 697220, 1026731, 1394440, 2053462, 4106924, 5133655, 7100351, 8213848, 10267310, 14200702, 20534620, 28401404, 35501755, 41069240, 56802808, 71003510, 142007020, 284014040, 504124921, 1008249842, 2016499684, 2520624605, 4032999368, 5041249210, 10082498420, 20164996840]

約数ペア:

[(1, 20164996840), (2, 10082498420), (4, 5041249210), (5, 4032999368), (8, 2520624605), (10, 2016499684), (20, 1008249842), (40, 504124921), (71, 284014040), (142, 142007020), (284, 71003510), (355, 56802808), (491, 41069240), (568, 35501755), (710, 28401404), (982, 20534620), (1420, 14200702), (1964, 10267310), (2455, 8213848), (2840, 7100351), (3928, 5133655), (4910, 4106924), (9820, 2053462), (14461, 1394440), (19640, 1026731), (28922, 697220), (34861, 578440), (57844, 348610), (69722, 289220), (72305, 278888), (115688, 174305), (139444, 144610)]