20160217

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{113}}^1\times {\mathrm{331}}^1$

素因数の和:469

約数の個数: 24

約数和(自身を含む): 25888032

約数和(自身を除く): 5727815

約数列:

[1, 7, 11, 49, 77, 113, 331, 539, 791, 1243, 2317, 3641, 5537, 8701, 16219, 25487, 37403, 60907, 178409, 261821, 411433, 1832747, 2880031, 20160217]

約数ペア:

[(1, 20160217), (7, 2880031), (11, 1832747), (49, 411433), (77, 261821), (113, 178409), (331, 60907), (539, 37403), (791, 25487), (1243, 16219), (2317, 8701), (3641, 5537)]