21082495

素因数分解:

$5^1\times 7^3\times {\mathrm{19}}^1\times {\mathrm{647}}^1$

素因数の和:692

約数の個数: 32

約数和(自身を含む): 31104000

約数和(自身を除く): 10021505

約数列:

[1, 5, 7, 19, 35, 49, 95, 133, 245, 343, 647, 665, 931, 1715, 3235, 4529, 4655, 6517, 12293, 22645, 31703, 32585, 61465, 86051, 158515, 221921, 430255, 602357, 1109605, 3011785, 4216499, 21082495]

約数ペア:

[(1, 21082495), (5, 4216499), (7, 3011785), (19, 1109605), (35, 602357), (49, 430255), (95, 221921), (133, 158515), (245, 86051), (343, 61465), (647, 32585), (665, 31703), (931, 22645), (1715, 12293), (3235, 6517), (4529, 4655)]