127968980

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{227}}^1\times {\mathrm{397}}^1$

素因数の和:704

約数の個数: 48

約数和(自身を含む): 274409856

約数和(自身を除く): 146440876

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 227, 284, 355, 397, 454, 710, 794, 908, 1135, 1420, 1588, 1985, 2270, 3970, 4540, 7940, 16117, 28187, 32234, 56374, 64468, 80585, 90119, 112748, 140935, 161170, 180238, 281870, 322340, 360476, 450595, 563740, 901190, 1802380, 6398449, 12796898, 25593796, 31992245, 63984490, 127968980]

約数ペア:

[(1, 127968980), (2, 63984490), (4, 31992245), (5, 25593796), (10, 12796898), (20, 6398449), (71, 1802380), (142, 901190), (227, 563740), (284, 450595), (355, 360476), (397, 322340), (454, 281870), (710, 180238), (794, 161170), (908, 140935), (1135, 112748), (1420, 90119), (1588, 80585), (1985, 64468), (2270, 56374), (3970, 32234), (4540, 28187), (7940, 16117)]