18894640

素因数分解:

$2^4\times 5^1\times {\mathrm{257}}^1\times {\mathrm{919}}^1$

素因数の和:1189

約数の個数: 40

約数和(自身を含む): 44148960

約数和(自身を除く): 25254320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 257, 514, 919, 1028, 1285, 1838, 2056, 2570, 3676, 4112, 4595, 5140, 7352, 9190, 10280, 14704, 18380, 20560, 36760, 73520, 236183, 472366, 944732, 1180915, 1889464, 2361830, 3778928, 4723660, 9447320, 18894640]

約数ペア:

[(1, 18894640), (2, 9447320), (4, 4723660), (5, 3778928), (8, 2361830), (10, 1889464), (16, 1180915), (20, 944732), (40, 472366), (80, 236183), (257, 73520), (514, 36760), (919, 20560), (1028, 18380), (1285, 14704), (1838, 10280), (2056, 9190), (2570, 7352), (3676, 5140), (4112, 4595)]