20154860

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^2\times {\mathrm{317}}^1$

素因数の和:371

約数の個数: 72

約数和(自身を含む): 49203504

約数和(自身を除く): 29048644

約数列:

[1, 2, 4, 5, 10, 11, 17, 20, 22, 34, 44, 55, 68, 85, 110, 170, 187, 220, 289, 317, 340, 374, 578, 634, 748, 935, 1156, 1268, 1445, 1585, 1870, 2890, 3170, 3179, 3487, 3740, 5389, 5780, 6340, 6358, 6974, 10778, 12716, 13948, 15895, 17435, 21556, 26945, 31790, 34870, 53890, 59279, 63580, 69740, 91613, 107780, 118558, 183226, 237116, 296395, 366452, 458065, 592790, 916130, 1007743, 1185580, 1832260, 2015486, 4030972, 5038715, 10077430, 20154860]

約数ペア:

[(1, 20154860), (2, 10077430), (4, 5038715), (5, 4030972), (10, 2015486), (11, 1832260), (17, 1185580), (20, 1007743), (22, 916130), (34, 592790), (44, 458065), (55, 366452), (68, 296395), (85, 237116), (110, 183226), (170, 118558), (187, 107780), (220, 91613), (289, 69740), (317, 63580), (340, 59279), (374, 53890), (578, 34870), (634, 31790), (748, 26945), (935, 21556), (1156, 17435), (1268, 15895), (1445, 13948), (1585, 12716), (1870, 10778), (2890, 6974), (3170, 6358), (3179, 6340), (3487, 5780), (3740, 5389)]