20586640

素因数分解:

$2^4\times 5^1\times {\mathrm{277}}^1\times {\mathrm{929}}^1$

素因数の和:1219

約数の個数: 40

約数和(自身を含む): 48088440

約数和(自身を除く): 27501800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 277, 554, 929, 1108, 1385, 1858, 2216, 2770, 3716, 4432, 4645, 5540, 7432, 9290, 11080, 14864, 18580, 22160, 37160, 74320, 257333, 514666, 1029332, 1286665, 2058664, 2573330, 4117328, 5146660, 10293320, 20586640]

約数ペア:

[(1, 20586640), (2, 10293320), (4, 5146660), (5, 4117328), (8, 2573330), (10, 2058664), (16, 1286665), (20, 1029332), (40, 514666), (80, 257333), (277, 74320), (554, 37160), (929, 22160), (1108, 18580), (1385, 14864), (1858, 11080), (2216, 9290), (2770, 7432), (3716, 5540), (4432, 4645)]