28243280

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^2\times {\mathrm{2089}}^1$

素因数の和:2128

約数の個数: 60

約数和(自身を含む): 71139420

約数和(自身を除く): 42896140

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 169, 208, 260, 338, 520, 676, 845, 1040, 1352, 1690, 2089, 2704, 3380, 4178, 6760, 8356, 10445, 13520, 16712, 20890, 27157, 33424, 41780, 54314, 83560, 108628, 135785, 167120, 217256, 271570, 353041, 434512, 543140, 706082, 1086280, 1412164, 1765205, 2172560, 2824328, 3530410, 5648656, 7060820, 14121640, 28243280]

約数ペア:

[(1, 28243280), (2, 14121640), (4, 7060820), (5, 5648656), (8, 3530410), (10, 2824328), (13, 2172560), (16, 1765205), (20, 1412164), (26, 1086280), (40, 706082), (52, 543140), (65, 434512), (80, 353041), (104, 271570), (130, 217256), (169, 167120), (208, 135785), (260, 108628), (338, 83560), (520, 54314), (676, 41780), (845, 33424), (1040, 27157), (1352, 20890), (1690, 16712), (2089, 13520), (2704, 10445), (3380, 8356), (4178, 6760)]