21494404

素因数分解:

$2^2\times {\mathrm{67}}^1\times {\mathrm{139}}^1\times {\mathrm{577}}^1$

素因数の和:787

約数の個数: 24

約数和(自身を含む): 38517920

約数和(自身を除く): 17023516

約数列:

[1, 2, 4, 67, 134, 139, 268, 278, 556, 577, 1154, 2308, 9313, 18626, 37252, 38659, 77318, 80203, 154636, 160406, 320812, 5373601, 10747202, 21494404]

約数ペア:

[(1, 21494404), (2, 10747202), (4, 5373601), (67, 320812), (134, 160406), (139, 154636), (268, 80203), (278, 77318), (556, 38659), (577, 37252), (1154, 18626), (2308, 9313)]