18987225

素因数分解:

$3^1\times 5^2\times {\mathrm{383}}^1\times {\mathrm{661}}^1$

素因数の和:1057

約数の個数: 24

約数和(自身を含む): 31521792

約数和(自身を除く): 12534567

約数列:

[1, 3, 5, 15, 25, 75, 383, 661, 1149, 1915, 1983, 3305, 5745, 9575, 9915, 16525, 28725, 49575, 253163, 759489, 1265815, 3797445, 6329075, 18987225]

約数ペア:

[(1, 18987225), (3, 6329075), (5, 3797445), (15, 1265815), (25, 759489), (75, 253163), (383, 49575), (661, 28725), (1149, 16525), (1915, 9915), (1983, 9575), (3305, 5745)]