21908763

素因数分解:

$3^2\times {\mathrm{83}}^1\times {\mathrm{139}}^1\times {\mathrm{211}}^1$

素因数の和:439

約数の個数: 24

約数和(自身を含む): 32410560

約数和(自身を除く): 10501797

約数列:

[1, 3, 9, 83, 139, 211, 249, 417, 633, 747, 1251, 1899, 11537, 17513, 29329, 34611, 52539, 87987, 103833, 157617, 263961, 2434307, 7302921, 21908763]

約数ペア:

[(1, 21908763), (3, 7302921), (9, 2434307), (83, 263961), (139, 157617), (211, 103833), (249, 87987), (417, 52539), (633, 34611), (747, 29329), (1251, 17513), (1899, 11537)]