18721240

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{16139}}^1$

素因数の和:16179

約数の個数: 32

約数和(自身を含む): 43578000

約数和(自身を除く): 24856760

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 116, 145, 232, 290, 580, 1160, 16139, 32278, 64556, 80695, 129112, 161390, 322780, 468031, 645560, 936062, 1872124, 2340155, 3744248, 4680310, 9360620, 18721240]

約数ペア:

[(1, 18721240), (2, 9360620), (4, 4680310), (5, 3744248), (8, 2340155), (10, 1872124), (20, 936062), (29, 645560), (40, 468031), (58, 322780), (116, 161390), (145, 129112), (232, 80695), (290, 64556), (580, 32278), (1160, 16139)]