18886640

素因数分解:

$2^4\times 5^1\times {\mathrm{307}}^1\times {\mathrm{769}}^1$

素因数の和:1089

約数の個数: 40

約数和(自身を含む): 44111760

約数和(自身を除く): 25225120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 307, 614, 769, 1228, 1535, 1538, 2456, 3070, 3076, 3845, 4912, 6140, 6152, 7690, 12280, 12304, 15380, 24560, 30760, 61520, 236083, 472166, 944332, 1180415, 1888664, 2360830, 3777328, 4721660, 9443320, 18886640]

約数ペア:

[(1, 18886640), (2, 9443320), (4, 4721660), (5, 3777328), (8, 2360830), (10, 1888664), (16, 1180415), (20, 944332), (40, 472166), (80, 236083), (307, 61520), (614, 30760), (769, 24560), (1228, 15380), (1535, 12304), (1538, 12280), (2456, 7690), (3070, 6152), (3076, 6140), (3845, 4912)]