20675915

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^2\times {\mathrm{331}}^1$

素因数の和:411

約数の個数: 24

約数和(自身を含む): 27692784

約数和(自身を除く): 7016869

約数列:

[1, 5, 13, 31, 65, 155, 331, 403, 961, 1655, 2015, 4303, 4805, 10261, 12493, 21515, 51305, 62465, 133393, 318091, 666965, 1590455, 4135183, 20675915]

約数ペア:

[(1, 20675915), (5, 4135183), (13, 1590455), (31, 666965), (65, 318091), (155, 133393), (331, 62465), (403, 51305), (961, 21515), (1655, 12493), (2015, 10261), (4303, 4805)]