21126320

素因数分解:

$2^4\times 5^1\times {\mathrm{181}}^1\times {\mathrm{1459}}^1$

素因数の和:1653

約数の個数: 40

約数和(自身を含む): 49423920

約数和(自身を除く): 28297600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 181, 362, 724, 905, 1448, 1459, 1810, 2896, 2918, 3620, 5836, 7240, 7295, 11672, 14480, 14590, 23344, 29180, 58360, 116720, 264079, 528158, 1056316, 1320395, 2112632, 2640790, 4225264, 5281580, 10563160, 21126320]

約数ペア:

[(1, 21126320), (2, 10563160), (4, 5281580), (5, 4225264), (8, 2640790), (10, 2112632), (16, 1320395), (20, 1056316), (40, 528158), (80, 264079), (181, 116720), (362, 58360), (724, 29180), (905, 23344), (1448, 14590), (1459, 14480), (1810, 11672), (2896, 7295), (2918, 7240), (3620, 5836)]