21887620

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{239}}^1\times {\mathrm{241}}^1$

素因数の和:508

約数の個数: 48

約数和(自身を含む): 48787200

約数和(自身を除く): 26899580

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 239, 241, 380, 478, 482, 956, 964, 1195, 1205, 2390, 2410, 4541, 4579, 4780, 4820, 9082, 9158, 18164, 18316, 22705, 22895, 45410, 45790, 57599, 90820, 91580, 115198, 230396, 287995, 575990, 1094381, 1151980, 2188762, 4377524, 5471905, 10943810, 21887620]

約数ペア:

[(1, 21887620), (2, 10943810), (4, 5471905), (5, 4377524), (10, 2188762), (19, 1151980), (20, 1094381), (38, 575990), (76, 287995), (95, 230396), (190, 115198), (239, 91580), (241, 90820), (380, 57599), (478, 45790), (482, 45410), (956, 22895), (964, 22705), (1195, 18316), (1205, 18164), (2390, 9158), (2410, 9082), (4541, 4820), (4579, 4780)]