20811992

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{269}}^1\times {\mathrm{509}}^1$

素因数の和:803

約数の個数: 32

約数和(自身を含む): 41310000

約数和(自身を除く): 20498008

約数列:

[1, 2, 4, 8, 19, 38, 76, 152, 269, 509, 538, 1018, 1076, 2036, 2152, 4072, 5111, 9671, 10222, 19342, 20444, 38684, 40888, 77368, 136921, 273842, 547684, 1095368, 2601499, 5202998, 10405996, 20811992]

約数ペア:

[(1, 20811992), (2, 10405996), (4, 5202998), (8, 2601499), (19, 1095368), (38, 547684), (76, 273842), (152, 136921), (269, 77368), (509, 40888), (538, 38684), (1018, 20444), (1076, 19342), (2036, 10222), (2152, 9671), (4072, 5111)]