21171358

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{2521}}^1$

素因数の和:2572

約数の個数: 32

約数和(自身を含む): 38132640

約数和(自身を除く): 16961282

約数列:

[1, 2, 13, 17, 19, 26, 34, 38, 221, 247, 323, 442, 494, 646, 2521, 4199, 5042, 8398, 32773, 42857, 47899, 65546, 85714, 95798, 557141, 622687, 814283, 1114282, 1245374, 1628566, 10585679, 21171358]

約数ペア:

[(1, 21171358), (2, 10585679), (13, 1628566), (17, 1245374), (19, 1114282), (26, 814283), (34, 622687), (38, 557141), (221, 95798), (247, 85714), (323, 65546), (442, 47899), (494, 42857), (646, 32773), (2521, 8398), (4199, 5042)]