12640280

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{7349}}^1$

素因数の和:7403

約数の個数: 32

約数和(自身を含む): 29106000

約数和(自身を除く): 16465720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 7349, 14698, 29396, 36745, 58792, 73490, 146980, 293960, 316007, 632014, 1264028, 1580035, 2528056, 3160070, 6320140, 12640280]

約数ペア:

[(1, 12640280), (2, 6320140), (4, 3160070), (5, 2528056), (8, 1580035), (10, 1264028), (20, 632014), (40, 316007), (43, 293960), (86, 146980), (172, 73490), (215, 58792), (344, 36745), (430, 29396), (860, 14698), (1720, 7349)]