20169989720

素因数分解:

$2^3\times 5^1\times {\mathrm{431}}^1\times {\mathrm{887}}^1\times {\mathrm{1319}}^1$

素因数の和:2648

約数の個数: 64

約数和(自身を含む): 45573580800

約数和(自身を除く): 25403591080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 431, 862, 887, 1319, 1724, 1774, 2155, 2638, 3448, 3548, 4310, 4435, 5276, 6595, 7096, 8620, 8870, 10552, 13190, 17240, 17740, 26380, 35480, 52760, 382297, 568489, 764594, 1136978, 1169953, 1529188, 1911485, 2273956, 2339906, 2842445, 3058376, 3822970, 4547912, 4679812, 5684890, 5849765, 7645940, 9359624, 11369780, 11699530, 15291880, 22739560, 23399060, 46798120, 504249743, 1008499486, 2016998972, 2521248715, 4033997944, 5042497430, 10084994860, 20169989720]

約数ペア:

[(1, 20169989720), (2, 10084994860), (4, 5042497430), (5, 4033997944), (8, 2521248715), (10, 2016998972), (20, 1008499486), (40, 504249743), (431, 46798120), (862, 23399060), (887, 22739560), (1319, 15291880), (1724, 11699530), (1774, 11369780), (2155, 9359624), (2638, 7645940), (3448, 5849765), (3548, 5684890), (4310, 4679812), (4435, 4547912), (5276, 3822970), (6595, 3058376), (7096, 2842445), (8620, 2339906), (8870, 2273956), (10552, 1911485), (13190, 1529188), (17240, 1169953), (17740, 1136978), (26380, 764594), (35480, 568489), (52760, 382297)]