81988575

素因数分解:

$3^1\times 5^2\times {\mathrm{61}}^1\times {\mathrm{17921}}^1$

素因数の和:17995

約数の個数: 24

約数和(自身を含む): 137784336

約数和(自身を除く): 55795761

約数列:

[1, 3, 5, 15, 25, 61, 75, 183, 305, 915, 1525, 4575, 17921, 53763, 89605, 268815, 448025, 1093181, 1344075, 3279543, 5465905, 16397715, 27329525, 81988575]

約数ペア:

[(1, 81988575), (3, 27329525), (5, 16397715), (15, 5465905), (25, 3279543), (61, 1344075), (75, 1093181), (183, 448025), (305, 268815), (915, 89605), (1525, 53763), (4575, 17921)]