21987880

素因数分解:

$2^3\times 5^1\times {\mathrm{181}}^1\times {\mathrm{3037}}^1$

素因数の和:3229

約数の個数: 32

約数和(自身を含む): 49762440

約数和(自身を除く): 27774560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 181, 362, 724, 905, 1448, 1810, 3037, 3620, 6074, 7240, 12148, 15185, 24296, 30370, 60740, 121480, 549697, 1099394, 2198788, 2748485, 4397576, 5496970, 10993940, 21987880]

約数ペア:

[(1, 21987880), (2, 10993940), (4, 5496970), (5, 4397576), (8, 2748485), (10, 2198788), (20, 1099394), (40, 549697), (181, 121480), (362, 60740), (724, 30370), (905, 24296), (1448, 15185), (1810, 12148), (3037, 7240), (3620, 6074)]