81318860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{19}}^2\times {\mathrm{1609}}^1$

素因数の和:1663

約数の個数: 72

約数和(自身を含む): 206105760

約数和(自身を除く): 124786900

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 35, 38, 70, 76, 95, 133, 140, 190, 266, 361, 380, 532, 665, 722, 1330, 1444, 1609, 1805, 2527, 2660, 3218, 3610, 5054, 6436, 7220, 8045, 10108, 11263, 12635, 16090, 22526, 25270, 30571, 32180, 45052, 50540, 56315, 61142, 112630, 122284, 152855, 213997, 225260, 305710, 427994, 580849, 611420, 855988, 1069985, 1161698, 2139970, 2323396, 2904245, 4065943, 4279940, 5808490, 8131886, 11616980, 16263772, 20329715, 40659430, 81318860]

約数ペア:

[(1, 81318860), (2, 40659430), (4, 20329715), (5, 16263772), (7, 11616980), (10, 8131886), (14, 5808490), (19, 4279940), (20, 4065943), (28, 2904245), (35, 2323396), (38, 2139970), (70, 1161698), (76, 1069985), (95, 855988), (133, 611420), (140, 580849), (190, 427994), (266, 305710), (361, 225260), (380, 213997), (532, 152855), (665, 122284), (722, 112630), (1330, 61142), (1444, 56315), (1609, 50540), (1805, 45052), (2527, 32180), (2660, 30571), (3218, 25270), (3610, 22526), (5054, 16090), (6436, 12635), (7220, 11263), (8045, 10108)]