21338656

素因数分解:

$2^5\times {\mathrm{163}}^1\times {\mathrm{4091}}^1$

素因数の和:4264

約数の個数: 24

約数和(自身を含む): 42278544

約数和(自身を除く): 20939888

約数列:

[1, 2, 4, 8, 16, 32, 163, 326, 652, 1304, 2608, 4091, 5216, 8182, 16364, 32728, 65456, 130912, 666833, 1333666, 2667332, 5334664, 10669328, 21338656]

約数ペア:

[(1, 21338656), (2, 10669328), (4, 5334664), (8, 2667332), (16, 1333666), (32, 666833), (163, 130912), (326, 65456), (652, 32728), (1304, 16364), (2608, 8182), (4091, 5216)]