20050120

素因数分解:

$2^3\times 5^1\times {\mathrm{431}}^1\times {\mathrm{1163}}^1$

素因数の和:1605

約数の個数: 32

約数和(自身を含む): 45256320

約数和(自身を除く): 25206200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 431, 862, 1163, 1724, 2155, 2326, 3448, 4310, 4652, 5815, 8620, 9304, 11630, 17240, 23260, 46520, 501253, 1002506, 2005012, 2506265, 4010024, 5012530, 10025060, 20050120]

約数ペア:

[(1, 20050120), (2, 10025060), (4, 5012530), (5, 4010024), (8, 2506265), (10, 2005012), (20, 1002506), (40, 501253), (431, 46520), (862, 23260), (1163, 17240), (1724, 11630), (2155, 9304), (2326, 8620), (3448, 5815), (4310, 4652)]