21563960

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{49009}}^1$

素因数の和:49031

約数の個数: 32

約数和(自身を含む): 52930800

約数和(自身を除く): 31366840

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 49009, 98018, 196036, 245045, 392072, 490090, 539099, 980180, 1078198, 1960360, 2156396, 2695495, 4312792, 5390990, 10781980, 21563960]

約数ペア:

[(1, 21563960), (2, 10781980), (4, 5390990), (5, 4312792), (8, 2695495), (10, 2156396), (11, 1960360), (20, 1078198), (22, 980180), (40, 539099), (44, 490090), (55, 392072), (88, 245045), (110, 196036), (220, 98018), (440, 49009)]