21332144

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{78427}}^1$

素因数の和:78452

約数の個数: 20

約数和(自身を含む): 43762824

約数和(自身を除く): 22430680

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 78427, 156854, 313708, 627416, 1254832, 1333259, 2666518, 5333036, 10666072, 21332144]

約数ペア:

[(1, 21332144), (2, 10666072), (4, 5333036), (8, 2666518), (16, 1333259), (17, 1254832), (34, 627416), (68, 313708), (136, 156854), (272, 78427)]