21639225

素因数分解:

$3^1\times 5^2\times {\mathrm{109}}^1\times {\mathrm{2647}}^1$

素因数の和:2769

約数の個数: 24

約数和(自身を含む): 36118720

約数和(自身を除く): 14479495

約数列:

[1, 3, 5, 15, 25, 75, 109, 327, 545, 1635, 2647, 2725, 7941, 8175, 13235, 39705, 66175, 198525, 288523, 865569, 1442615, 4327845, 7213075, 21639225]

約数ペア:

[(1, 21639225), (3, 7213075), (5, 4327845), (15, 1442615), (25, 865569), (75, 288523), (109, 198525), (327, 66175), (545, 39705), (1635, 13235), (2647, 8175), (2725, 7941)]