20215195

素因数分解:

$5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{577}}^1$

素因数の和:620

約数の個数: 48

約数和(自身を含む): 33209568

約数和(自身を除く): 12994373

約数列:

[1, 5, 7, 11, 13, 35, 49, 55, 65, 77, 91, 143, 245, 385, 455, 539, 577, 637, 715, 1001, 2695, 2885, 3185, 4039, 5005, 6347, 7007, 7501, 20195, 28273, 31735, 35035, 37505, 44429, 52507, 82511, 141365, 222145, 262535, 311003, 367549, 412555, 577577, 1555015, 1837745, 2887885, 4043039, 20215195]

約数ペア:

[(1, 20215195), (5, 4043039), (7, 2887885), (11, 1837745), (13, 1555015), (35, 577577), (49, 412555), (55, 367549), (65, 311003), (77, 262535), (91, 222145), (143, 141365), (245, 82511), (385, 52507), (455, 44429), (539, 37505), (577, 35035), (637, 31735), (715, 28273), (1001, 20195), (2695, 7501), (2885, 7007), (3185, 6347), (4039, 5005)]