18988640

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{10789}}^1$

素因数の和:10815

約数の個数: 48

約数和(自身を含む): 48943440

約数和(自身を除く): 29954800

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 80, 88, 110, 160, 176, 220, 352, 440, 880, 1760, 10789, 21578, 43156, 53945, 86312, 107890, 118679, 172624, 215780, 237358, 345248, 431560, 474716, 593395, 863120, 949432, 1186790, 1726240, 1898864, 2373580, 3797728, 4747160, 9494320, 18988640]

約数ペア:

[(1, 18988640), (2, 9494320), (4, 4747160), (5, 3797728), (8, 2373580), (10, 1898864), (11, 1726240), (16, 1186790), (20, 949432), (22, 863120), (32, 593395), (40, 474716), (44, 431560), (55, 345248), (80, 237358), (88, 215780), (110, 172624), (160, 118679), (176, 107890), (220, 86312), (352, 53945), (440, 43156), (880, 21578), (1760, 10789)]