21987440

素因数分解:

$2^4\times 5^1\times {\mathrm{274843}}^1$

素因数の和:274856

約数の個数: 20

約数和(自身を含む): 51120984

約数和(自身を除く): 29133544

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 274843, 549686, 1099372, 1374215, 2198744, 2748430, 4397488, 5496860, 10993720, 21987440]

約数ペア:

[(1, 21987440), (2, 10993720), (4, 5496860), (5, 4397488), (8, 2748430), (10, 2198744), (16, 1374215), (20, 1099372), (40, 549686), (80, 274843)]