18940870

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{367}}^1\times {\mathrm{397}}^1$

素因数の和:784

約数の個数: 32

約数和(自身を含む): 36908928

約数和(自身を除く): 17968058

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 367, 397, 734, 794, 1835, 1985, 3670, 3970, 4771, 5161, 9542, 10322, 23855, 25805, 47710, 51610, 145699, 291398, 728495, 1456990, 1894087, 3788174, 9470435, 18940870]

約数ペア:

[(1, 18940870), (2, 9470435), (5, 3788174), (10, 1894087), (13, 1456990), (26, 728495), (65, 291398), (130, 145699), (367, 51610), (397, 47710), (734, 25805), (794, 23855), (1835, 10322), (1985, 9542), (3670, 5161), (3970, 4771)]