21251468

素因数分解:

$2^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{73}}^1\times {\mathrm{281}}^1$

素因数の和:402

約数の個数: 48

約数和(自身を含む): 44407104

約数和(自身を除く): 23155636

約数列:

[1, 2, 4, 7, 14, 28, 37, 73, 74, 146, 148, 259, 281, 292, 511, 518, 562, 1022, 1036, 1124, 1967, 2044, 2701, 3934, 5402, 7868, 10397, 10804, 18907, 20513, 20794, 37814, 41026, 41588, 72779, 75628, 82052, 143591, 145558, 287182, 291116, 574364, 758981, 1517962, 3035924, 5312867, 10625734, 21251468]

約数ペア:

[(1, 21251468), (2, 10625734), (4, 5312867), (7, 3035924), (14, 1517962), (28, 758981), (37, 574364), (73, 291116), (74, 287182), (146, 145558), (148, 143591), (259, 82052), (281, 75628), (292, 72779), (511, 41588), (518, 41026), (562, 37814), (1022, 20794), (1036, 20513), (1124, 18907), (1967, 10804), (2044, 10397), (2701, 7868), (3934, 5402)]