20811004

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{67}}^2$

素因数の和:218

約数の個数: 36

約数和(自身を含む): 39554760

約数和(自身を除く): 18743756

約数列:

[1, 2, 4, 19, 38, 61, 67, 76, 122, 134, 244, 268, 1159, 1273, 2318, 2546, 4087, 4489, 4636, 5092, 8174, 8978, 16348, 17956, 77653, 85291, 155306, 170582, 273829, 310612, 341164, 547658, 1095316, 5202751, 10405502, 20811004]

約数ペア:

[(1, 20811004), (2, 10405502), (4, 5202751), (19, 1095316), (38, 547658), (61, 341164), (67, 310612), (76, 273829), (122, 170582), (134, 155306), (244, 85291), (268, 77653), (1159, 17956), (1273, 16348), (2318, 8978), (2546, 8174), (4087, 5092), (4489, 4636)]