21403952

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{78691}}^1$

素因数の和:78716

約数の個数: 20

約数和(自身を含む): 43910136

約数和(自身を除く): 22506184

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 78691, 157382, 314764, 629528, 1259056, 1337747, 2675494, 5350988, 10701976, 21403952]

約数ペア:

[(1, 21403952), (2, 10701976), (4, 5350988), (8, 2675494), (16, 1337747), (17, 1259056), (34, 629528), (68, 314764), (136, 157382), (272, 78691)]