81805625

素因数分解:

$5^4\times {\mathrm{11}}^1\times {\mathrm{73}}^1\times {\mathrm{163}}^1$

素因数の和:267

約数の個数: 40

約数和(自身を含む): 113738592

約数和(自身を除く): 31932967

約数列:

[1, 5, 11, 25, 55, 73, 125, 163, 275, 365, 625, 803, 815, 1375, 1793, 1825, 4015, 4075, 6875, 8965, 9125, 11899, 20075, 20375, 44825, 45625, 59495, 100375, 101875, 130889, 224125, 297475, 501875, 654445, 1120625, 1487375, 3272225, 7436875, 16361125, 81805625]

約数ペア:

[(1, 81805625), (5, 16361125), (11, 7436875), (25, 3272225), (55, 1487375), (73, 1120625), (125, 654445), (163, 501875), (275, 297475), (365, 224125), (625, 130889), (803, 101875), (815, 100375), (1375, 59495), (1793, 45625), (1825, 44825), (4015, 20375), (4075, 20075), (6875, 11899), (8965, 9125)]