81223180

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{45631}}^1$

素因数の和:45729

約数の個数: 24

約数和(自身を含む): 172488960

約数和(自身を除く): 91265780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 45631, 91262, 182524, 228155, 456310, 912620, 4061159, 8122318, 16244636, 20305795, 40611590, 81223180]

約数ペア:

[(1, 81223180), (2, 40611590), (4, 20305795), (5, 16244636), (10, 8122318), (20, 4061159), (89, 912620), (178, 456310), (356, 228155), (445, 182524), (890, 91262), (1780, 45631)]