20666680

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{383}}^1$

素因数の和:484

約数の個数: 64

約数和(自身を含む): 49766400

約数和(自身を除く): 29099720

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 71, 76, 95, 142, 152, 190, 284, 355, 380, 383, 568, 710, 760, 766, 1349, 1420, 1532, 1915, 2698, 2840, 3064, 3830, 5396, 6745, 7277, 7660, 10792, 13490, 14554, 15320, 26980, 27193, 29108, 36385, 53960, 54386, 58216, 72770, 108772, 135965, 145540, 217544, 271930, 291080, 516667, 543860, 1033334, 1087720, 2066668, 2583335, 4133336, 5166670, 10333340, 20666680]

約数ペア:

[(1, 20666680), (2, 10333340), (4, 5166670), (5, 4133336), (8, 2583335), (10, 2066668), (19, 1087720), (20, 1033334), (38, 543860), (40, 516667), (71, 291080), (76, 271930), (95, 217544), (142, 145540), (152, 135965), (190, 108772), (284, 72770), (355, 58216), (380, 54386), (383, 53960), (568, 36385), (710, 29108), (760, 27193), (766, 26980), (1349, 15320), (1420, 14554), (1532, 13490), (1915, 10792), (2698, 7660), (2840, 7277), (3064, 6745), (3830, 5396)]