18670640

素因数分解:

$2^4\times 5^1\times {\mathrm{419}}^1\times {\mathrm{557}}^1$

素因数の和:989

約数の個数: 40

約数和(自身を含む): 43590960

約数和(自身を除く): 24920320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 419, 557, 838, 1114, 1676, 2095, 2228, 2785, 3352, 4190, 4456, 5570, 6704, 8380, 8912, 11140, 16760, 22280, 33520, 44560, 233383, 466766, 933532, 1166915, 1867064, 2333830, 3734128, 4667660, 9335320, 18670640]

約数ペア:

[(1, 18670640), (2, 9335320), (4, 4667660), (5, 3734128), (8, 2333830), (10, 1867064), (16, 1166915), (20, 933532), (40, 466766), (80, 233383), (419, 44560), (557, 33520), (838, 22280), (1114, 16760), (1676, 11140), (2095, 8912), (2228, 8380), (2785, 6704), (3352, 5570), (4190, 4456)]