31127720

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{1931}}^1$

素因数の和:1986

約数の個数: 64

約数和(自身を含む): 77898240

約数和(自身を除く): 46770520

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 31, 40, 52, 62, 65, 104, 124, 130, 155, 248, 260, 310, 403, 520, 620, 806, 1240, 1612, 1931, 2015, 3224, 3862, 4030, 7724, 8060, 9655, 15448, 16120, 19310, 25103, 38620, 50206, 59861, 77240, 100412, 119722, 125515, 200824, 239444, 251030, 299305, 478888, 502060, 598610, 778193, 1004120, 1197220, 1556386, 2394440, 3112772, 3890965, 6225544, 7781930, 15563860, 31127720]

約数ペア:

[(1, 31127720), (2, 15563860), (4, 7781930), (5, 6225544), (8, 3890965), (10, 3112772), (13, 2394440), (20, 1556386), (26, 1197220), (31, 1004120), (40, 778193), (52, 598610), (62, 502060), (65, 478888), (104, 299305), (124, 251030), (130, 239444), (155, 200824), (248, 125515), (260, 119722), (310, 100412), (403, 77240), (520, 59861), (620, 50206), (806, 38620), (1240, 25103), (1612, 19310), (1931, 16120), (2015, 15448), (3224, 9655), (3862, 8060), (4030, 7724)]