90491120

素因数分解:

$2^4\times 5^1\times {\mathrm{1131139}}^1$

素因数の和:1131152

約数の個数: 20

約数和(自身を含む): 210392040

約数和(自身を除く): 119900920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1131139, 2262278, 4524556, 5655695, 9049112, 11311390, 18098224, 22622780, 45245560, 90491120]

約数ペア:

[(1, 90491120), (2, 45245560), (4, 22622780), (5, 18098224), (8, 11311390), (10, 9049112), (16, 5655695), (20, 4524556), (40, 2262278), (80, 1131139)]