21215240

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{18289}}^1$

素因数の和:18329

約数の個数: 32

約数和(自身を含む): 49383000

約数和(自身を除く): 28167760

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 116, 145, 232, 290, 580, 1160, 18289, 36578, 73156, 91445, 146312, 182890, 365780, 530381, 731560, 1060762, 2121524, 2651905, 4243048, 5303810, 10607620, 21215240]

約数ペア:

[(1, 21215240), (2, 10607620), (4, 5303810), (5, 4243048), (8, 2651905), (10, 2121524), (20, 1060762), (29, 731560), (40, 530381), (58, 365780), (116, 182890), (145, 146312), (232, 91445), (290, 73156), (580, 36578), (1160, 18289)]