21175400

素因数分解:

$2^3\times 5^2\times {\mathrm{239}}^1\times {\mathrm{443}}^1$

素因数の和:698

約数の個数: 48

約数和(自身を含む): 49550400

約数和(自身を除く): 28375000

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 239, 443, 478, 886, 956, 1195, 1772, 1912, 2215, 2390, 3544, 4430, 4780, 5975, 8860, 9560, 11075, 11950, 17720, 22150, 23900, 44300, 47800, 88600, 105877, 211754, 423508, 529385, 847016, 1058770, 2117540, 2646925, 4235080, 5293850, 10587700, 21175400]

約数ペア:

[(1, 21175400), (2, 10587700), (4, 5293850), (5, 4235080), (8, 2646925), (10, 2117540), (20, 1058770), (25, 847016), (40, 529385), (50, 423508), (100, 211754), (200, 105877), (239, 88600), (443, 47800), (478, 44300), (886, 23900), (956, 22150), (1195, 17720), (1772, 11950), (1912, 11075), (2215, 9560), (2390, 8860), (3544, 5975), (4430, 4780)]