20391976

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{317}}^1$

素因数の和:394

約数の個数: 64

約数和(自身を含む): 45334080

約数和(自身を除く): 24942104

約数列:

[1, 2, 4, 8, 11, 17, 22, 34, 43, 44, 68, 86, 88, 136, 172, 187, 317, 344, 374, 473, 634, 731, 748, 946, 1268, 1462, 1496, 1892, 2536, 2924, 3487, 3784, 5389, 5848, 6974, 8041, 10778, 13631, 13948, 16082, 21556, 27262, 27896, 32164, 43112, 54524, 59279, 64328, 109048, 118558, 149941, 231727, 237116, 299882, 463454, 474232, 599764, 926908, 1199528, 1853816, 2548997, 5097994, 10195988, 20391976]

約数ペア:

[(1, 20391976), (2, 10195988), (4, 5097994), (8, 2548997), (11, 1853816), (17, 1199528), (22, 926908), (34, 599764), (43, 474232), (44, 463454), (68, 299882), (86, 237116), (88, 231727), (136, 149941), (172, 118558), (187, 109048), (317, 64328), (344, 59279), (374, 54524), (473, 43112), (634, 32164), (731, 27896), (748, 27262), (946, 21556), (1268, 16082), (1462, 13948), (1496, 13631), (1892, 10778), (2536, 8041), (2924, 6974), (3487, 5848), (3784, 5389)]