18720867

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{79}}^1\times {\mathrm{167}}^1$

素因数の和:303

約数の個数: 32

約数和(自身を含む): 28385280

約数和(自身を除く): 9664413

約数列:

[1, 3, 11, 33, 43, 79, 129, 167, 237, 473, 501, 869, 1419, 1837, 2607, 3397, 5511, 7181, 10191, 13193, 21543, 37367, 39579, 78991, 112101, 145123, 236973, 435369, 567299, 1701897, 6240289, 18720867]

約数ペア:

[(1, 18720867), (3, 6240289), (11, 1701897), (33, 567299), (43, 435369), (79, 236973), (129, 145123), (167, 112101), (237, 78991), (473, 39579), (501, 37367), (869, 21543), (1419, 13193), (1837, 10191), (2607, 7181), (3397, 5511)]