20101000

素因数分解:

$2^3\times 5^3\times {\mathrm{20101}}^1$

素因数の和:20122

約数の個数: 32

約数和(自身を含む): 47038680

約数和(自身を除く): 26937680

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500, 1000, 20101, 40202, 80404, 100505, 160808, 201010, 402020, 502525, 804040, 1005050, 2010100, 2512625, 4020200, 5025250, 10050500, 20101000]

約数ペア:

[(1, 20101000), (2, 10050500), (4, 5025250), (5, 4020200), (8, 2512625), (10, 2010100), (20, 1005050), (25, 804040), (40, 502525), (50, 402020), (100, 201010), (125, 160808), (200, 100505), (250, 80404), (500, 40202), (1000, 20101)]