20385950

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{397}}^1$

素因数の和:501

約数の個数: 48

約数和(自身を含む): 41455680

約数和(自身を除く): 21069730

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 79, 130, 158, 325, 395, 397, 650, 790, 794, 1027, 1975, 1985, 2054, 3950, 3970, 5135, 5161, 9925, 10270, 10322, 19850, 25675, 25805, 31363, 51350, 51610, 62726, 129025, 156815, 258050, 313630, 407719, 784075, 815438, 1568150, 2038595, 4077190, 10192975, 20385950]

約数ペア:

[(1, 20385950), (2, 10192975), (5, 4077190), (10, 2038595), (13, 1568150), (25, 815438), (26, 784075), (50, 407719), (65, 313630), (79, 258050), (130, 156815), (158, 129025), (325, 62726), (395, 51610), (397, 51350), (650, 31363), (790, 25805), (794, 25675), (1027, 19850), (1975, 10322), (1985, 10270), (2054, 9925), (3950, 5161), (3970, 5135)]