21621518

素因数分解:

$2^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{643}}^1$

素因数の和:728

約数の個数: 32

約数和(自身を含む): 36723456

約数和(自身を除く): 15101938

約数列:

[1, 2, 17, 23, 34, 43, 46, 86, 391, 643, 731, 782, 989, 1286, 1462, 1978, 10931, 14789, 16813, 21862, 27649, 29578, 33626, 55298, 251413, 470033, 502826, 635927, 940066, 1271854, 10810759, 21621518]

約数ペア:

[(1, 21621518), (2, 10810759), (17, 1271854), (23, 940066), (34, 635927), (43, 502826), (46, 470033), (86, 251413), (391, 55298), (643, 33626), (731, 29578), (782, 27649), (989, 21862), (1286, 16813), (1462, 14789), (1978, 10931)]