20677280

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{9941}}^1$

素因数の和:9969

約数の個数: 48

約数和(自身を含む): 52613064

約数和(自身を除く): 31935784

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 80, 104, 130, 160, 208, 260, 416, 520, 1040, 2080, 9941, 19882, 39764, 49705, 79528, 99410, 129233, 159056, 198820, 258466, 318112, 397640, 516932, 646165, 795280, 1033864, 1292330, 1590560, 2067728, 2584660, 4135456, 5169320, 10338640, 20677280]

約数ペア:

[(1, 20677280), (2, 10338640), (4, 5169320), (5, 4135456), (8, 2584660), (10, 2067728), (13, 1590560), (16, 1292330), (20, 1033864), (26, 795280), (32, 646165), (40, 516932), (52, 397640), (65, 318112), (80, 258466), (104, 198820), (130, 159056), (160, 129233), (208, 99410), (260, 79528), (416, 49705), (520, 39764), (1040, 19882), (2080, 9941)]