18077680

素因数分解:

$2^4\times 5^1\times {\mathrm{89}}^1\times {\mathrm{2539}}^1$

素因数の和:2641

約数の個数: 40

約数和(自身を含む): 42519600

約数和(自身を除く): 24441920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 89, 178, 356, 445, 712, 890, 1424, 1780, 2539, 3560, 5078, 7120, 10156, 12695, 20312, 25390, 40624, 50780, 101560, 203120, 225971, 451942, 903884, 1129855, 1807768, 2259710, 3615536, 4519420, 9038840, 18077680]

約数ペア:

[(1, 18077680), (2, 9038840), (4, 4519420), (5, 3615536), (8, 2259710), (10, 1807768), (16, 1129855), (20, 903884), (40, 451942), (80, 225971), (89, 203120), (178, 101560), (356, 50780), (445, 40624), (712, 25390), (890, 20312), (1424, 12695), (1780, 10156), (2539, 7120), (3560, 5078)]