21009850

素因数分解:

$2^1\times 5^2\times {\mathrm{139}}^1\times {\mathrm{3023}}^1$

素因数の和:3174

約数の個数: 24

約数和(自身を含む): 39372480

約数和(自身を除く): 18362630

約数列:

[1, 2, 5, 10, 25, 50, 139, 278, 695, 1390, 3023, 3475, 6046, 6950, 15115, 30230, 75575, 151150, 420197, 840394, 2100985, 4201970, 10504925, 21009850]

約数ペア:

[(1, 21009850), (2, 10504925), (5, 4201970), (10, 2100985), (25, 840394), (50, 420197), (139, 151150), (278, 75575), (695, 30230), (1390, 15115), (3023, 6950), (3475, 6046)]