87989990

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{72719}}^1$

素因数の和:72748

約数の個数: 24

約数和(自身を含む): 174091680

約数和(自身を除く): 86101690

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 121, 242, 605, 1210, 72719, 145438, 363595, 727190, 799909, 1599818, 3999545, 7999090, 8798999, 17597998, 43994995, 87989990]

約数ペア:

[(1, 87989990), (2, 43994995), (5, 17597998), (10, 8798999), (11, 7999090), (22, 3999545), (55, 1599818), (110, 799909), (121, 727190), (242, 363595), (605, 145438), (1210, 72719)]