18887920

素因数分解:

$2^4\times 5^1\times {\mathrm{229}}^1\times {\mathrm{1031}}^1$

素因数の和:1273

約数の個数: 40

約数和(自身を含む): 44148960

約数和(自身を除く): 25261040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 229, 458, 916, 1031, 1145, 1832, 2062, 2290, 3664, 4124, 4580, 5155, 8248, 9160, 10310, 16496, 18320, 20620, 41240, 82480, 236099, 472198, 944396, 1180495, 1888792, 2360990, 3777584, 4721980, 9443960, 18887920]

約数ペア:

[(1, 18887920), (2, 9443960), (4, 4721980), (5, 3777584), (8, 2360990), (10, 1888792), (16, 1180495), (20, 944396), (40, 472198), (80, 236099), (229, 82480), (458, 41240), (916, 20620), (1031, 18320), (1145, 16496), (1832, 10310), (2062, 9160), (2290, 8248), (3664, 5155), (4124, 4580)]