21997280

素因数分解:

$2^5\times 5^1\times {\mathrm{137483}}^1$

素因数の和:137498

約数の個数: 24

約数和(自身を含む): 51968952

約数和(自身を除く): 29971672

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 137483, 274966, 549932, 687415, 1099864, 1374830, 2199728, 2749660, 4399456, 5499320, 10998640, 21997280]

約数ペア:

[(1, 21997280), (2, 10998640), (4, 5499320), (5, 4399456), (8, 2749660), (10, 2199728), (16, 1374830), (20, 1099864), (32, 687415), (40, 549932), (80, 274966), (160, 137483)]