20508350

素因数分解:

$2^1\times 5^2\times {\mathrm{53}}^1\times {\mathrm{71}}^1\times {\mathrm{109}}^1$

素因数の和:245

約数の個数: 48

約数和(自身を含む): 39774240

約数和(自身を除く): 19265890

約数列:

[1, 2, 5, 10, 25, 50, 53, 71, 106, 109, 142, 218, 265, 355, 530, 545, 710, 1090, 1325, 1775, 2650, 2725, 3550, 3763, 5450, 5777, 7526, 7739, 11554, 15478, 18815, 28885, 37630, 38695, 57770, 77390, 94075, 144425, 188150, 193475, 288850, 386950, 410167, 820334, 2050835, 4101670, 10254175, 20508350]

約数ペア:

[(1, 20508350), (2, 10254175), (5, 4101670), (10, 2050835), (25, 820334), (50, 410167), (53, 386950), (71, 288850), (106, 193475), (109, 188150), (142, 144425), (218, 94075), (265, 77390), (355, 57770), (530, 38695), (545, 37630), (710, 28885), (1090, 18815), (1325, 15478), (1775, 11554), (2650, 7739), (2725, 7526), (3550, 5777), (3763, 5450)]