12387500

素因数分解:

$2^2\times 5^5\times {\mathrm{991}}^1$

素因数の和:1020

約数の個数: 36

約数和(自身を含む): 27123264

約数和(自身を除く): 14735764

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 250, 500, 625, 991, 1250, 1982, 2500, 3125, 3964, 4955, 6250, 9910, 12500, 19820, 24775, 49550, 99100, 123875, 247750, 495500, 619375, 1238750, 2477500, 3096875, 6193750, 12387500]

約数ペア:

[(1, 12387500), (2, 6193750), (4, 3096875), (5, 2477500), (10, 1238750), (20, 619375), (25, 495500), (50, 247750), (100, 123875), (125, 99100), (250, 49550), (500, 24775), (625, 19820), (991, 12500), (1250, 9910), (1982, 6250), (2500, 4955), (3125, 3964)]