20806515

素因数分解:

$3^2\times 5^1\times {\mathrm{67}}^2\times {\mathrm{103}}^1$

素因数の和:248

約数の個数: 36

約数和(自身を含む): 36966384

約数和(自身を除く): 16159869

約数列:

[1, 3, 5, 9, 15, 45, 67, 103, 201, 309, 335, 515, 603, 927, 1005, 1545, 3015, 4489, 4635, 6901, 13467, 20703, 22445, 34505, 40401, 62109, 67335, 103515, 202005, 310545, 462367, 1387101, 2311835, 4161303, 6935505, 20806515]

約数ペア:

[(1, 20806515), (3, 6935505), (5, 4161303), (9, 2311835), (15, 1387101), (45, 462367), (67, 310545), (103, 202005), (201, 103515), (309, 67335), (335, 62109), (515, 40401), (603, 34505), (927, 22445), (1005, 20703), (1545, 13467), (3015, 6901), (4489, 4635)]