21478665

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{4789}}^1$

素因数の和:4833

約数の個数: 32

約数和(自身を含む): 38626560

約数和(自身を除く): 17147895

約数列:

[1, 3, 5, 13, 15, 23, 39, 65, 69, 115, 195, 299, 345, 897, 1495, 4485, 4789, 14367, 23945, 62257, 71835, 110147, 186771, 311285, 330441, 550735, 933855, 1431911, 1652205, 4295733, 7159555, 21478665]

約数ペア:

[(1, 21478665), (3, 7159555), (5, 4295733), (13, 1652205), (15, 1431911), (23, 933855), (39, 550735), (65, 330441), (69, 311285), (115, 186771), (195, 110147), (299, 71835), (345, 62257), (897, 23945), (1495, 14367), (4485, 4789)]