20520225

素因数分解:

$3^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{8291}}^1$

素因数の和:8318

約数の個数: 36

約数和(自身を含む): 40100112

約数和(自身を除く): 19579887

約数列:

[1, 3, 5, 9, 11, 15, 25, 33, 45, 55, 75, 99, 165, 225, 275, 495, 825, 2475, 8291, 24873, 41455, 74619, 91201, 124365, 207275, 273603, 373095, 456005, 621825, 820809, 1368015, 1865475, 2280025, 4104045, 6840075, 20520225]

約数ペア:

[(1, 20520225), (3, 6840075), (5, 4104045), (9, 2280025), (11, 1865475), (15, 1368015), (25, 820809), (33, 621825), (45, 456005), (55, 373095), (75, 273603), (99, 207275), (165, 124365), (225, 91201), (275, 74619), (495, 41455), (825, 24873), (2475, 8291)]