21391804

素因数分解:

$2^2\times 7^1\times {\mathrm{113}}^1\times {\mathrm{6761}}^1$

素因数の和:6885

約数の個数: 24

約数和(自身を含む): 43168608

約数和(自身を除く): 21776804

約数列:

[1, 2, 4, 7, 14, 28, 113, 226, 452, 791, 1582, 3164, 6761, 13522, 27044, 47327, 94654, 189308, 763993, 1527986, 3055972, 5347951, 10695902, 21391804]

約数ペア:

[(1, 21391804), (2, 10695902), (4, 5347951), (7, 3055972), (14, 1527986), (28, 763993), (113, 189308), (226, 94654), (452, 47327), (791, 27044), (1582, 13522), (3164, 6761)]