71721447

素因数分解:

$3^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{25679}}^1$

素因数の和:25715

約数の個数: 24

約数和(自身を含む): 117100800

約数和(自身を除く): 45379353

約数列:

[1, 3, 7, 19, 21, 49, 57, 133, 147, 399, 931, 2793, 25679, 77037, 179753, 487901, 539259, 1258271, 1463703, 3415307, 3774813, 10245921, 23907149, 71721447]

約数ペア:

[(1, 71721447), (3, 23907149), (7, 10245921), (19, 3774813), (21, 3415307), (49, 1463703), (57, 1258271), (133, 539259), (147, 487901), (399, 179753), (931, 77037), (2793, 25679)]