638245977

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{157}}^1\times {\mathrm{1009}}^1$

素因数の和:1265

約数の個数: 32

約数和(自身を含む): 919180800

約数和(自身を除く): 280934823

約数列:

[1, 3, 17, 51, 79, 157, 237, 471, 1009, 1343, 2669, 3027, 4029, 8007, 12403, 17153, 37209, 51459, 79711, 158413, 210851, 239133, 475239, 632553, 1355087, 2693021, 4065261, 8079063, 12514627, 37543881, 212748659, 638245977]

約数ペア:

[(1, 638245977), (3, 212748659), (17, 37543881), (51, 12514627), (79, 8079063), (157, 4065261), (237, 2693021), (471, 1355087), (1009, 632553), (1343, 475239), (2669, 239133), (3027, 210851), (4029, 158413), (8007, 79711), (12403, 51459), (17153, 37209)]