18979120

素因数分解:

$2^4\times 5^1\times {\mathrm{59}}^1\times {\mathrm{4021}}^1$

素因数の和:4093

約数の個数: 40

約数和(自身を含む): 44885520

約数和(自身を除く): 25906400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 59, 80, 118, 236, 295, 472, 590, 944, 1180, 2360, 4021, 4720, 8042, 16084, 20105, 32168, 40210, 64336, 80420, 160840, 237239, 321680, 474478, 948956, 1186195, 1897912, 2372390, 3795824, 4744780, 9489560, 18979120]

約数ペア:

[(1, 18979120), (2, 9489560), (4, 4744780), (5, 3795824), (8, 2372390), (10, 1897912), (16, 1186195), (20, 948956), (40, 474478), (59, 321680), (80, 237239), (118, 160840), (236, 80420), (295, 64336), (472, 40210), (590, 32168), (944, 20105), (1180, 16084), (2360, 8042), (4021, 4720)]