21034520

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{2129}}^1$

素因数の和:2172

約数の個数: 64

約数和(自身を含む): 53676000

約数和(自身を除く): 32641480

約数列:

[1, 2, 4, 5, 8, 10, 13, 19, 20, 26, 38, 40, 52, 65, 76, 95, 104, 130, 152, 190, 247, 260, 380, 494, 520, 760, 988, 1235, 1976, 2129, 2470, 4258, 4940, 8516, 9880, 10645, 17032, 21290, 27677, 40451, 42580, 55354, 80902, 85160, 110708, 138385, 161804, 202255, 221416, 276770, 323608, 404510, 525863, 553540, 809020, 1051726, 1107080, 1618040, 2103452, 2629315, 4206904, 5258630, 10517260, 21034520]

約数ペア:

[(1, 21034520), (2, 10517260), (4, 5258630), (5, 4206904), (8, 2629315), (10, 2103452), (13, 1618040), (19, 1107080), (20, 1051726), (26, 809020), (38, 553540), (40, 525863), (52, 404510), (65, 323608), (76, 276770), (95, 221416), (104, 202255), (130, 161804), (152, 138385), (190, 110708), (247, 85160), (260, 80902), (380, 55354), (494, 42580), (520, 40451), (760, 27677), (988, 21290), (1235, 17032), (1976, 10645), (2129, 9880), (2470, 8516), (4258, 4940)]