21150670

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{79}}^1\times {\mathrm{653}}^1$

素因数の和:780

約数の個数: 32

約数和(自身を含む): 39553920

約数和(自身を除く): 18403250

約数列:

[1, 2, 5, 10, 41, 79, 82, 158, 205, 395, 410, 653, 790, 1306, 3239, 3265, 6478, 6530, 16195, 26773, 32390, 51587, 53546, 103174, 133865, 257935, 267730, 515870, 2115067, 4230134, 10575335, 21150670]

約数ペア:

[(1, 21150670), (2, 10575335), (5, 4230134), (10, 2115067), (41, 515870), (79, 267730), (82, 257935), (158, 133865), (205, 103174), (395, 53546), (410, 51587), (653, 32390), (790, 26773), (1306, 16195), (3239, 6530), (3265, 6478)]