20311990

素因数分解:

$2^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{1879}}^1$

素因数の和:1956

約数の個数: 32

約数和(自身を含む): 38983680

約数和(自身を除く): 18671690

約数列:

[1, 2, 5, 10, 23, 46, 47, 94, 115, 230, 235, 470, 1081, 1879, 2162, 3758, 5405, 9395, 10810, 18790, 43217, 86434, 88313, 176626, 216085, 432170, 441565, 883130, 2031199, 4062398, 10155995, 20311990]

約数ペア:

[(1, 20311990), (2, 10155995), (5, 4062398), (10, 2031199), (23, 883130), (46, 441565), (47, 432170), (94, 216085), (115, 176626), (230, 88313), (235, 86434), (470, 43217), (1081, 18790), (1879, 10810), (2162, 9395), (3758, 5405)]