820723760

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{199}}^1\times {\mathrm{1663}}^1$

素因数の和:1906

約数の個数: 80

約数和(自身を含む): 1980825600

約数和(自身を除く): 1160101840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 199, 248, 310, 398, 496, 620, 796, 995, 1240, 1592, 1663, 1990, 2480, 3184, 3326, 3980, 6169, 6652, 7960, 8315, 12338, 13304, 15920, 16630, 24676, 26608, 30845, 33260, 49352, 51553, 61690, 66520, 98704, 103106, 123380, 133040, 206212, 246760, 257765, 330937, 412424, 493520, 515530, 661874, 824848, 1031060, 1323748, 1654685, 2062120, 2647496, 3309370, 4124240, 5294992, 6618740, 10259047, 13237480, 20518094, 26474960, 41036188, 51295235, 82072376, 102590470, 164144752, 205180940, 410361880, 820723760]

約数ペア:

[(1, 820723760), (2, 410361880), (4, 205180940), (5, 164144752), (8, 102590470), (10, 82072376), (16, 51295235), (20, 41036188), (31, 26474960), (40, 20518094), (62, 13237480), (80, 10259047), (124, 6618740), (155, 5294992), (199, 4124240), (248, 3309370), (310, 2647496), (398, 2062120), (496, 1654685), (620, 1323748), (796, 1031060), (995, 824848), (1240, 661874), (1592, 515530), (1663, 493520), (1990, 412424), (2480, 330937), (3184, 257765), (3326, 246760), (3980, 206212), (6169, 133040), (6652, 123380), (7960, 103106), (8315, 98704), (12338, 66520), (13304, 61690), (15920, 51553), (16630, 49352), (24676, 33260), (26608, 30845)]