21123843

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{151}}^1\times {\mathrm{211}}^1$

素因数の和:395

約数の個数: 32

約数和(自身を含む): 32481792

約数和(自身を除く): 11357949

約数列:

[1, 3, 13, 17, 39, 51, 151, 211, 221, 453, 633, 663, 1963, 2567, 2743, 3587, 5889, 7701, 8229, 10761, 31861, 33371, 46631, 95583, 100113, 139893, 414193, 541637, 1242579, 1624911, 7041281, 21123843]

約数ペア:

[(1, 21123843), (3, 7041281), (13, 1624911), (17, 1242579), (39, 541637), (51, 414193), (151, 139893), (211, 100113), (221, 95583), (453, 46631), (633, 33371), (663, 31861), (1963, 10761), (2567, 8229), (2743, 7701), (3587, 5889)]