21465785

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{239}}^1$

素因数の和:349

約数の個数: 32

約数和(自身を含む): 29859840

約数和(自身を除く): 8394055

約数列:

[1, 5, 11, 23, 55, 71, 115, 239, 253, 355, 781, 1195, 1265, 1633, 2629, 3905, 5497, 8165, 13145, 16969, 17963, 27485, 60467, 84845, 89815, 186659, 302335, 390287, 933295, 1951435, 4293157, 21465785]

約数ペア:

[(1, 21465785), (5, 4293157), (11, 1951435), (23, 933295), (55, 390287), (71, 302335), (115, 186659), (239, 89815), (253, 84845), (355, 60467), (781, 27485), (1195, 17963), (1265, 16969), (1633, 13145), (2629, 8165), (3905, 5497)]