21380458920

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{178170491}}^1$

素因数の和:178170505

約数の個数: 32

約数和(自身を含む): 64141377120

約数和(自身を除く): 42760918200

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 178170491, 356340982, 534511473, 712681964, 890852455, 1069022946, 1425363928, 1781704910, 2138045892, 2672557365, 3563409820, 4276091784, 5345114730, 7126819640, 10690229460, 21380458920]

約数ペア:

[(1, 21380458920), (2, 10690229460), (3, 7126819640), (4, 5345114730), (5, 4276091784), (6, 3563409820), (8, 2672557365), (10, 2138045892), (12, 1781704910), (15, 1425363928), (20, 1069022946), (24, 890852455), (30, 712681964), (40, 534511473), (60, 356340982), (120, 178170491)]