18723887

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{67}}^1\times {\mathrm{83}}^1$

素因数の和:207

約数の個数: 32

約数和(自身を含む): 24310272

約数和(自身を除く): 5586385

約数列:

[1, 7, 13, 37, 67, 83, 91, 259, 469, 481, 581, 871, 1079, 2479, 3071, 3367, 5561, 6097, 7553, 17353, 21497, 32227, 38927, 39923, 72293, 205757, 225589, 279461, 506051, 1440299, 2674841, 18723887]

約数ペア:

[(1, 18723887), (7, 2674841), (13, 1440299), (37, 506051), (67, 279461), (83, 225589), (91, 205757), (259, 72293), (469, 39923), (481, 38927), (581, 32227), (871, 21497), (1079, 17353), (2479, 7553), (3071, 6097), (3367, 5561)]