20970915

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{97}}^1$

素因数の和:212

約数の個数: 64

約数和(自身を含む): 40642560

約数和(自身を除く): 19671645

約数列:

[1, 3, 5, 7, 15, 21, 29, 35, 71, 87, 97, 105, 145, 203, 213, 291, 355, 435, 485, 497, 609, 679, 1015, 1065, 1455, 1491, 2037, 2059, 2485, 2813, 3045, 3395, 6177, 6887, 7455, 8439, 10185, 10295, 14065, 14413, 19691, 20661, 30885, 34435, 42195, 43239, 48209, 59073, 72065, 98455, 103305, 144627, 199723, 216195, 241045, 295365, 599169, 723135, 998615, 1398061, 2995845, 4194183, 6990305, 20970915]

約数ペア:

[(1, 20970915), (3, 6990305), (5, 4194183), (7, 2995845), (15, 1398061), (21, 998615), (29, 723135), (35, 599169), (71, 295365), (87, 241045), (97, 216195), (105, 199723), (145, 144627), (203, 103305), (213, 98455), (291, 72065), (355, 59073), (435, 48209), (485, 43239), (497, 42195), (609, 34435), (679, 30885), (1015, 20661), (1065, 19691), (1455, 14413), (1491, 14065), (2037, 10295), (2059, 10185), (2485, 8439), (2813, 7455), (3045, 6887), (3395, 6177)]