20990030

素因数分解:

$2^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{263}}^1\times {\mathrm{347}}^1$

素因数の和:640

約数の個数: 32

約数和(自身を含む): 39688704

約数和(自身を除く): 18698674

約数列:

[1, 2, 5, 10, 23, 46, 115, 230, 263, 347, 526, 694, 1315, 1735, 2630, 3470, 6049, 7981, 12098, 15962, 30245, 39905, 60490, 79810, 91261, 182522, 456305, 912610, 2099003, 4198006, 10495015, 20990030]

約数ペア:

[(1, 20990030), (2, 10495015), (5, 4198006), (10, 2099003), (23, 912610), (46, 456305), (115, 182522), (230, 91261), (263, 79810), (347, 60490), (526, 39905), (694, 30245), (1315, 15962), (1735, 12098), (2630, 7981), (3470, 6049)]