20456500

素因数分解:

$2^2\times 5^3\times {\mathrm{163}}^1\times {\mathrm{251}}^1$

素因数の和:433

約数の個数: 48

約数和(自身を含む): 45130176

約数和(自身を除く): 24673676

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 163, 250, 251, 326, 500, 502, 652, 815, 1004, 1255, 1630, 2510, 3260, 4075, 5020, 6275, 8150, 12550, 16300, 20375, 25100, 31375, 40750, 40913, 62750, 81500, 81826, 125500, 163652, 204565, 409130, 818260, 1022825, 2045650, 4091300, 5114125, 10228250, 20456500]

約数ペア:

[(1, 20456500), (2, 10228250), (4, 5114125), (5, 4091300), (10, 2045650), (20, 1022825), (25, 818260), (50, 409130), (100, 204565), (125, 163652), (163, 125500), (250, 81826), (251, 81500), (326, 62750), (500, 40913), (502, 40750), (652, 31375), (815, 25100), (1004, 20375), (1255, 16300), (1630, 12550), (2510, 8150), (3260, 6275), (4075, 5020)]