18214640

素因数分解:

$2^4\times 5^1\times {\mathrm{223}}^1\times {\mathrm{1021}}^1$

素因数の和:1257

約数の個数: 40

約数和(自身を含む): 42580608

約数和(自身を除く): 24365968

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 223, 446, 892, 1021, 1115, 1784, 2042, 2230, 3568, 4084, 4460, 5105, 8168, 8920, 10210, 16336, 17840, 20420, 40840, 81680, 227683, 455366, 910732, 1138415, 1821464, 2276830, 3642928, 4553660, 9107320, 18214640]

約数ペア:

[(1, 18214640), (2, 9107320), (4, 4553660), (5, 3642928), (8, 2276830), (10, 1821464), (16, 1138415), (20, 910732), (40, 455366), (80, 227683), (223, 81680), (446, 40840), (892, 20420), (1021, 17840), (1115, 16336), (1784, 10210), (2042, 8920), (2230, 8168), (3568, 5105), (4084, 4460)]