18901883

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{821}}^1$

素因数の和:875

約数の個数: 32

約数和(自身を含む): 26514432

約数和(自身を除く): 7612549

約数列:

[1, 7, 11, 13, 23, 77, 91, 143, 161, 253, 299, 821, 1001, 1771, 2093, 3289, 5747, 9031, 10673, 18883, 23023, 63217, 74711, 117403, 132181, 207713, 245479, 821821, 1453991, 1718353, 2700269, 18901883]

約数ペア:

[(1, 18901883), (7, 2700269), (11, 1718353), (13, 1453991), (23, 821821), (77, 245479), (91, 207713), (143, 132181), (161, 117403), (253, 74711), (299, 63217), (821, 23023), (1001, 18883), (1771, 10673), (2093, 9031), (3289, 5747)]