20417590

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{2621}}^1$

素因数の和:2688

約数の個数: 32

約数和(自身を含む): 39644640

約数和(自身を除く): 19227050

約数列:

[1, 2, 5, 10, 19, 38, 41, 82, 95, 190, 205, 410, 779, 1558, 2621, 3895, 5242, 7790, 13105, 26210, 49799, 99598, 107461, 214922, 248995, 497990, 537305, 1074610, 2041759, 4083518, 10208795, 20417590]

約数ペア:

[(1, 20417590), (2, 10208795), (5, 4083518), (10, 2041759), (19, 1074610), (38, 537305), (41, 497990), (82, 248995), (95, 214922), (190, 107461), (205, 99598), (410, 49799), (779, 26210), (1558, 13105), (2621, 7790), (3895, 5242)]