20657968

素因数分解:

$2^4\times {\mathrm{89}}^2\times {\mathrm{163}}^1$

素因数の和:349

約数の個数: 30

約数和(自身を含む): 40727924

約数和(自身を除く): 20069956

約数列:

[1, 2, 4, 8, 16, 89, 163, 178, 326, 356, 652, 712, 1304, 1424, 2608, 7921, 14507, 15842, 29014, 31684, 58028, 63368, 116056, 126736, 232112, 1291123, 2582246, 5164492, 10328984, 20657968]

約数ペア:

[(1, 20657968), (2, 10328984), (4, 5164492), (8, 2582246), (16, 1291123), (89, 232112), (163, 126736), (178, 116056), (326, 63368), (356, 58028), (652, 31684), (712, 29014), (1304, 15842), (1424, 14507), (2608, 7921)]