21428908

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{3989}}^1$

素因数の和:4089

約数の個数: 24

約数和(自身を含む): 40219200

約数和(自身を除く): 18790292

約数列:

[1, 2, 4, 17, 34, 68, 79, 158, 316, 1343, 2686, 3989, 5372, 7978, 15956, 67813, 135626, 271252, 315131, 630262, 1260524, 5357227, 10714454, 21428908]

約数ペア:

[(1, 21428908), (2, 10714454), (4, 5357227), (17, 1260524), (34, 630262), (68, 315131), (79, 271252), (158, 135626), (316, 67813), (1343, 15956), (2686, 7978), (3989, 5372)]