21400245

素因数分解:

$3^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{12853}}^1$

素因数の和:12901

約数の個数: 24

約数和(自身を含む): 38099256

約数和(自身を除く): 16699011

約数列:

[1, 3, 5, 9, 15, 37, 45, 111, 185, 333, 555, 1665, 12853, 38559, 64265, 115677, 192795, 475561, 578385, 1426683, 2377805, 4280049, 7133415, 21400245]

約数ペア:

[(1, 21400245), (3, 7133415), (5, 4280049), (9, 2377805), (15, 1426683), (37, 578385), (45, 475561), (111, 192795), (185, 115677), (333, 64265), (555, 38559), (1665, 12853)]