28688140

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{110339}}^1$

素因数の和:110361

約数の個数: 24

約数和(自身を含む): 64879920

約数和(自身を除く): 36191780

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 110339, 220678, 441356, 551695, 1103390, 1434407, 2206780, 2868814, 5737628, 7172035, 14344070, 28688140]

約数ペア:

[(1, 28688140), (2, 14344070), (4, 7172035), (5, 5737628), (10, 2868814), (13, 2206780), (20, 1434407), (26, 1103390), (52, 551695), (65, 441356), (130, 220678), (260, 110339)]