21384350

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{167}}^1\times {\mathrm{197}}^1$

素因数の和:389

約数の個数: 48

約数和(自身を含む): 43309728

約数和(自身を除く): 21925378

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 130, 167, 197, 325, 334, 394, 650, 835, 985, 1670, 1970, 2171, 2561, 4175, 4342, 4925, 5122, 8350, 9850, 10855, 12805, 21710, 25610, 32899, 54275, 64025, 65798, 108550, 128050, 164495, 328990, 427687, 822475, 855374, 1644950, 2138435, 4276870, 10692175, 21384350]

約数ペア:

[(1, 21384350), (2, 10692175), (5, 4276870), (10, 2138435), (13, 1644950), (25, 855374), (26, 822475), (50, 427687), (65, 328990), (130, 164495), (167, 128050), (197, 108550), (325, 65798), (334, 64025), (394, 54275), (650, 32899), (835, 25610), (985, 21710), (1670, 12805), (1970, 10855), (2171, 9850), (2561, 8350), (4175, 5122), (4342, 4925)]