20998516

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{863}}^1$

素因数の和:964

約数の個数: 48

約数和(自身を含む): 46448640

約数和(自身を除く): 25450124

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 77, 79, 154, 158, 308, 316, 553, 863, 869, 1106, 1726, 1738, 2212, 3452, 3476, 6041, 6083, 9493, 12082, 12166, 18986, 24164, 24332, 37972, 66451, 68177, 132902, 136354, 265804, 272708, 477239, 749947, 954478, 1499894, 1908956, 2999788, 5249629, 10499258, 20998516]

約数ペア:

[(1, 20998516), (2, 10499258), (4, 5249629), (7, 2999788), (11, 1908956), (14, 1499894), (22, 954478), (28, 749947), (44, 477239), (77, 272708), (79, 265804), (154, 136354), (158, 132902), (308, 68177), (316, 66451), (553, 37972), (863, 24332), (869, 24164), (1106, 18986), (1726, 12166), (1738, 12082), (2212, 9493), (3452, 6083), (3476, 6041)]