81404775

素因数分解:

$3^2\times 5^2\times {\mathrm{361799}}^1$

素因数の和:361815

約数の個数: 18

約数和(自身を含む): 145805400

約数和(自身を除く): 64400625

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 225, 361799, 1085397, 1808995, 3256191, 5426985, 9044975, 16280955, 27134925, 81404775]

約数ペア:

[(1, 81404775), (3, 27134925), (5, 16280955), (9, 9044975), (15, 5426985), (25, 3256191), (45, 1808995), (75, 1085397), (225, 361799)]