8040040

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{149}}^1$

素因数の和:250

約数の個数: 64

約数和(自身を含む): 19440000

約数和(自身を除く): 11399960

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 71, 76, 95, 142, 149, 152, 190, 284, 298, 355, 380, 568, 596, 710, 745, 760, 1192, 1349, 1420, 1490, 2698, 2831, 2840, 2980, 5396, 5662, 5960, 6745, 10579, 10792, 11324, 13490, 14155, 21158, 22648, 26980, 28310, 42316, 52895, 53960, 56620, 84632, 105790, 113240, 201001, 211580, 402002, 423160, 804004, 1005005, 1608008, 2010010, 4020020, 8040040]

約数ペア:

[(1, 8040040), (2, 4020020), (4, 2010010), (5, 1608008), (8, 1005005), (10, 804004), (19, 423160), (20, 402002), (38, 211580), (40, 201001), (71, 113240), (76, 105790), (95, 84632), (142, 56620), (149, 53960), (152, 52895), (190, 42316), (284, 28310), (298, 26980), (355, 22648), (380, 21158), (568, 14155), (596, 13490), (710, 11324), (745, 10792), (760, 10579), (1192, 6745), (1349, 5960), (1420, 5662), (1490, 5396), (2698, 2980), (2831, 2840)]