20657902

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{139}}^1\times {\mathrm{3911}}^1$

素因数の和:4071

約数の個数: 16

約数和(自身を含む): 32860800

約数和(自身を除く): 12202898

約数列:

[1, 2, 19, 38, 139, 278, 2641, 3911, 5282, 7822, 74309, 148618, 543629, 1087258, 10328951, 20657902]

約数ペア:

[(1, 20657902), (2, 10328951), (19, 1087258), (38, 543629), (139, 148618), (278, 74309), (2641, 7822), (3911, 5282)]