21240075

素因数分解:

$3^1\times 5^2\times {\mathrm{173}}^1\times {\mathrm{1637}}^1$

素因数の和:1823

約数の個数: 24

約数和(自身を含む): 35341488

約数和(自身を除く): 14101413

約数列:

[1, 3, 5, 15, 25, 75, 173, 519, 865, 1637, 2595, 4325, 4911, 8185, 12975, 24555, 40925, 122775, 283201, 849603, 1416005, 4248015, 7080025, 21240075]

約数ペア:

[(1, 21240075), (3, 7080025), (5, 4248015), (15, 1416005), (25, 849603), (75, 283201), (173, 122775), (519, 40925), (865, 24555), (1637, 12975), (2595, 8185), (4325, 4911)]