21454640

素因数分解:

$2^4\times 5^1\times {\mathrm{233}}^1\times {\mathrm{1151}}^1$

素因数の和:1397

約数の個数: 40

約数和(自身を含む): 50139648

約数和(自身を除く): 28685008

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 233, 466, 932, 1151, 1165, 1864, 2302, 2330, 3728, 4604, 4660, 5755, 9208, 9320, 11510, 18416, 18640, 23020, 46040, 92080, 268183, 536366, 1072732, 1340915, 2145464, 2681830, 4290928, 5363660, 10727320, 21454640]

約数ペア:

[(1, 21454640), (2, 10727320), (4, 5363660), (5, 4290928), (8, 2681830), (10, 2145464), (16, 1340915), (20, 1072732), (40, 536366), (80, 268183), (233, 92080), (466, 46040), (932, 23020), (1151, 18640), (1165, 18416), (1864, 11510), (2302, 9320), (2330, 9208), (3728, 5755), (4604, 4660)]