81788180

素因数分解:

$2^2\times 5^1\times {\mathrm{103}}^1\times {\mathrm{39703}}^1$

素因数の和:39815

約数の個数: 24

約数和(自身を含む): 173427072

約数和(自身を除く): 91638892

約数列:

[1, 2, 4, 5, 10, 20, 103, 206, 412, 515, 1030, 2060, 39703, 79406, 158812, 198515, 397030, 794060, 4089409, 8178818, 16357636, 20447045, 40894090, 81788180]

約数ペア:

[(1, 81788180), (2, 40894090), (4, 20447045), (5, 16357636), (10, 8178818), (20, 4089409), (103, 794060), (206, 397030), (412, 198515), (515, 158812), (1030, 79406), (2060, 39703)]