19907920

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{8581}}^1$

素因数の和:8623

約数の個数: 40

約数和(自身を含む): 47887560

約数和(自身を除く): 27979640

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 40, 58, 80, 116, 145, 232, 290, 464, 580, 1160, 2320, 8581, 17162, 34324, 42905, 68648, 85810, 137296, 171620, 248849, 343240, 497698, 686480, 995396, 1244245, 1990792, 2488490, 3981584, 4976980, 9953960, 19907920]

約数ペア:

[(1, 19907920), (2, 9953960), (4, 4976980), (5, 3981584), (8, 2488490), (10, 1990792), (16, 1244245), (20, 995396), (29, 686480), (40, 497698), (58, 343240), (80, 248849), (116, 171620), (145, 137296), (232, 85810), (290, 68648), (464, 42905), (580, 34324), (1160, 17162), (2320, 8581)]