78871940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{499}}^1\times {\mathrm{1129}}^1$

素因数の和:1644

約数の個数: 48

約数和(自身を含む): 189840000

約数和(自身を除く): 110968060

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 499, 998, 1129, 1996, 2258, 2495, 3493, 4516, 4990, 5645, 6986, 7903, 9980, 11290, 13972, 15806, 17465, 22580, 31612, 34930, 39515, 69860, 79030, 158060, 563371, 1126742, 2253484, 2816855, 3943597, 5633710, 7887194, 11267420, 15774388, 19717985, 39435970, 78871940]

約数ペア:

[(1, 78871940), (2, 39435970), (4, 19717985), (5, 15774388), (7, 11267420), (10, 7887194), (14, 5633710), (20, 3943597), (28, 2816855), (35, 2253484), (70, 1126742), (140, 563371), (499, 158060), (998, 79030), (1129, 69860), (1996, 39515), (2258, 34930), (2495, 31612), (3493, 22580), (4516, 17465), (4990, 15806), (5645, 13972), (6986, 11290), (7903, 9980)]