21538825

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{67}}^1\times {\mathrm{167}}^1$

素因数の和:262

約数の個数: 48

約数和(自身を含む): 33997824

約数和(自身を除く): 12458999

約数列:

[1, 5, 7, 11, 25, 35, 55, 67, 77, 167, 175, 275, 335, 385, 469, 737, 835, 1169, 1675, 1837, 1925, 2345, 3685, 4175, 5159, 5845, 9185, 11189, 11725, 12859, 18425, 25795, 29225, 45925, 55945, 64295, 78323, 123079, 128975, 279725, 321475, 391615, 615395, 861553, 1958075, 3076975, 4307765, 21538825]

約数ペア:

[(1, 21538825), (5, 4307765), (7, 3076975), (11, 1958075), (25, 861553), (35, 615395), (55, 391615), (67, 321475), (77, 279725), (167, 128975), (175, 123079), (275, 78323), (335, 64295), (385, 55945), (469, 45925), (737, 29225), (835, 25795), (1169, 18425), (1675, 12859), (1837, 11725), (1925, 11189), (2345, 9185), (3685, 5845), (4175, 5159)]