21790545

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{23}}^1\times {\mathrm{1289}}^1$

素因数の和:1334

約数の個数: 48

約数和(自身を含む): 42353280

約数和(自身を除く): 20562735

約数列:

[1, 3, 5, 7, 15, 21, 23, 35, 49, 69, 105, 115, 147, 161, 245, 345, 483, 735, 805, 1127, 1289, 2415, 3381, 3867, 5635, 6445, 9023, 16905, 19335, 27069, 29647, 45115, 63161, 88941, 135345, 148235, 189483, 207529, 315805, 444705, 622587, 947415, 1037645, 1452703, 3112935, 4358109, 7263515, 21790545]

約数ペア:

[(1, 21790545), (3, 7263515), (5, 4358109), (7, 3112935), (15, 1452703), (21, 1037645), (23, 947415), (35, 622587), (49, 444705), (69, 315805), (105, 207529), (115, 189483), (147, 148235), (161, 135345), (245, 88941), (345, 63161), (483, 45115), (735, 29647), (805, 27069), (1127, 19335), (1289, 16905), (2415, 9023), (3381, 6445), (3867, 5635)]