19902090

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{51031}}^1$

素因数の和:51054

約数の個数: 32

約数和(自身を含む): 51440256

約数和(自身を除く): 31538166

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390, 51031, 102062, 153093, 255155, 306186, 510310, 663403, 765465, 1326806, 1530930, 1990209, 3317015, 3980418, 6634030, 9951045, 19902090]

約数ペア:

[(1, 19902090), (2, 9951045), (3, 6634030), (5, 3980418), (6, 3317015), (10, 1990209), (13, 1530930), (15, 1326806), (26, 765465), (30, 663403), (39, 510310), (65, 306186), (78, 255155), (130, 153093), (195, 102062), (390, 51031)]