20153705

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{397}}^1$

素因数の和:497

約数の個数: 32

約数和(自身を含む): 28885248

約数和(自身を除く): 8731543

約数列:

[1, 5, 11, 13, 55, 65, 71, 143, 355, 397, 715, 781, 923, 1985, 3905, 4367, 4615, 5161, 10153, 21835, 25805, 28187, 50765, 56771, 140935, 283855, 310057, 366431, 1550285, 1832155, 4030741, 20153705]

約数ペア:

[(1, 20153705), (5, 4030741), (11, 1832155), (13, 1550285), (55, 366431), (65, 310057), (71, 283855), (143, 140935), (355, 56771), (397, 50765), (715, 28187), (781, 25805), (923, 21835), (1985, 10153), (3905, 5161), (4367, 4615)]