18266980

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{907}}^1$

素因数の和:988

約数の個数: 48

約数和(自身を含む): 41186880

約数和(自身を除く): 22919900

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 53, 76, 95, 106, 190, 212, 265, 380, 530, 907, 1007, 1060, 1814, 2014, 3628, 4028, 4535, 5035, 9070, 10070, 17233, 18140, 20140, 34466, 48071, 68932, 86165, 96142, 172330, 192284, 240355, 344660, 480710, 913349, 961420, 1826698, 3653396, 4566745, 9133490, 18266980]

約数ペア:

[(1, 18266980), (2, 9133490), (4, 4566745), (5, 3653396), (10, 1826698), (19, 961420), (20, 913349), (38, 480710), (53, 344660), (76, 240355), (95, 192284), (106, 172330), (190, 96142), (212, 86165), (265, 68932), (380, 48071), (530, 34466), (907, 20140), (1007, 18140), (1060, 17233), (1814, 10070), (2014, 9070), (3628, 5035), (4028, 4535)]