644475

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{661}}^1$

素因数の和:687

約数の個数: 24

約数和(自身を含む): 1149232

約数和(自身を除く): 504757

約数列:

[1, 3, 5, 13, 15, 25, 39, 65, 75, 195, 325, 661, 975, 1983, 3305, 8593, 9915, 16525, 25779, 42965, 49575, 128895, 214825, 644475]

約数ペア:

[(1, 644475), (3, 214825), (5, 128895), (13, 49575), (15, 42965), (25, 25779), (39, 16525), (65, 9915), (75, 8593), (195, 3305), (325, 1983), (661, 975)]