81215239

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{79}}^1\times {\mathrm{163}}^1$

素因数の和:319

約数の個数: 32

約数和(自身を含む): 102021120

約数和(自身を除く): 20805881

約数列:

[1, 7, 17, 53, 79, 119, 163, 371, 553, 901, 1141, 1343, 2771, 4187, 6307, 8639, 9401, 12877, 19397, 29309, 60473, 71179, 90139, 146863, 218909, 498253, 682481, 1028041, 1532363, 4777367, 11602177, 81215239]

約数ペア:

[(1, 81215239), (7, 11602177), (17, 4777367), (53, 1532363), (79, 1028041), (119, 682481), (163, 498253), (371, 218909), (553, 146863), (901, 90139), (1141, 71179), (1343, 60473), (2771, 29309), (4187, 19397), (6307, 12877), (8639, 9401)]