21478888

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{157933}}^1$

素因数の和:157956

約数の個数: 16

約数和(自身を含む): 42642180

約数和(自身を除く): 21163292

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 157933, 315866, 631732, 1263464, 2684861, 5369722, 10739444, 21478888]

約数ペア:

[(1, 21478888), (2, 10739444), (4, 5369722), (8, 2684861), (17, 1263464), (34, 631732), (68, 315866), (136, 157933)]