20721105

素因数分解:

$3^2\times 5^1\times {\mathrm{347}}^1\times {\mathrm{1327}}^1$

素因数の和:1685

約数の個数: 24

約数和(自身を含む): 36047232

約数和(自身を除く): 15326127

約数列:

[1, 3, 5, 9, 15, 45, 347, 1041, 1327, 1735, 3123, 3981, 5205, 6635, 11943, 15615, 19905, 59715, 460469, 1381407, 2302345, 4144221, 6907035, 20721105]

約数ペア:

[(1, 20721105), (3, 6907035), (5, 4144221), (9, 2302345), (15, 1381407), (45, 460469), (347, 59715), (1041, 19905), (1327, 15615), (1735, 11943), (3123, 6635), (3981, 5205)]