28057780

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{19759}}^1$

素因数の和:19839

約数の個数: 24

約数和(自身を含む): 59754240

約数和(自身を除く): 31696460

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 19759, 39518, 79036, 98795, 197590, 395180, 1402889, 2805778, 5611556, 7014445, 14028890, 28057780]

約数ペア:

[(1, 28057780), (2, 14028890), (4, 7014445), (5, 5611556), (10, 2805778), (20, 1402889), (71, 395180), (142, 197590), (284, 98795), (355, 79036), (710, 39518), (1420, 19759)]