21131312

素因数分解:

$2^4\times {\mathrm{53}}^1\times {\mathrm{24919}}^1$

素因数の和:24980

約数の個数: 20

約数和(自身を含む): 41716080

約数和(自身を除く): 20584768

約数列:

[1, 2, 4, 8, 16, 53, 106, 212, 424, 848, 24919, 49838, 99676, 199352, 398704, 1320707, 2641414, 5282828, 10565656, 21131312]

約数ペア:

[(1, 21131312), (2, 10565656), (4, 5282828), (8, 2641414), (16, 1320707), (53, 398704), (106, 199352), (212, 99676), (424, 49838), (848, 24919)]