21540896

素因数分解:

$2^5\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{977}}^1$

素因数の和:1053

約数の個数: 48

約数和(自身を含む): 46580184

約数和(自身を除く): 25039288

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 53, 104, 106, 208, 212, 416, 424, 689, 848, 977, 1378, 1696, 1954, 2756, 3908, 5512, 7816, 11024, 12701, 15632, 22048, 25402, 31264, 50804, 51781, 101608, 103562, 203216, 207124, 406432, 414248, 673153, 828496, 1346306, 1656992, 2692612, 5385224, 10770448, 21540896]

約数ペア:

[(1, 21540896), (2, 10770448), (4, 5385224), (8, 2692612), (13, 1656992), (16, 1346306), (26, 828496), (32, 673153), (52, 414248), (53, 406432), (104, 207124), (106, 203216), (208, 103562), (212, 101608), (416, 51781), (424, 50804), (689, 31264), (848, 25402), (977, 22048), (1378, 15632), (1696, 12701), (1954, 11024), (2756, 7816), (3908, 5512)]