18847960

素因数分解:

$2^3\times 5^1\times {\mathrm{223}}^1\times {\mathrm{2113}}^1$

素因数の和:2347

約数の個数: 32

約数和(自身を含む): 42618240

約数和(自身を除く): 23770280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 223, 446, 892, 1115, 1784, 2113, 2230, 4226, 4460, 8452, 8920, 10565, 16904, 21130, 42260, 84520, 471199, 942398, 1884796, 2355995, 3769592, 4711990, 9423980, 18847960]

約数ペア:

[(1, 18847960), (2, 9423980), (4, 4711990), (5, 3769592), (8, 2355995), (10, 1884796), (20, 942398), (40, 471199), (223, 84520), (446, 42260), (892, 21130), (1115, 16904), (1784, 10565), (2113, 8920), (2230, 8452), (4226, 4460)]