20891605

素因数分解:

$5^1\times 7^1\times {\mathrm{59}}^1\times {\mathrm{67}}^1\times {\mathrm{151}}^1$

素因数の和:289

約数の個数: 32

約数和(自身を含む): 29767680

約数和(自身を除く): 8876075

約数列:

[1, 5, 7, 35, 59, 67, 151, 295, 335, 413, 469, 755, 1057, 2065, 2345, 3953, 5285, 8909, 10117, 19765, 27671, 44545, 50585, 62363, 70819, 138355, 311815, 354095, 596903, 2984515, 4178321, 20891605]

約数ペア:

[(1, 20891605), (5, 4178321), (7, 2984515), (35, 596903), (59, 354095), (67, 311815), (151, 138355), (295, 70819), (335, 62363), (413, 50585), (469, 44545), (755, 27671), (1057, 19765), (2065, 10117), (2345, 8909), (3953, 5285)]