20540

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1$

素因数の和:101

約数の個数: 24

約数和(自身を含む): 47040

約数和(自身を除く): 26500

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 79, 130, 158, 260, 316, 395, 790, 1027, 1580, 2054, 4108, 5135, 10270, 20540]

約数ペア:

[(1, 20540), (2, 10270), (4, 5135), (5, 4108), (10, 2054), (13, 1580), (20, 1027), (26, 790), (52, 395), (65, 316), (79, 260), (130, 158)]