20508724336

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{491}}^1\times {\mathrm{137399}}^1$

素因数の和:137917

約数の個数: 40

約数和(自身を含む): 41912496000

約数和(自身を除く): 21403771664

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 304, 491, 982, 1964, 3928, 7856, 9329, 18658, 37316, 74632, 137399, 149264, 274798, 549596, 1099192, 2198384, 2610581, 5221162, 10442324, 20884648, 41769296, 67462909, 134925818, 269851636, 539703272, 1079406544, 1281795271, 2563590542, 5127181084, 10254362168, 20508724336]

約数ペア:

[(1, 20508724336), (2, 10254362168), (4, 5127181084), (8, 2563590542), (16, 1281795271), (19, 1079406544), (38, 539703272), (76, 269851636), (152, 134925818), (304, 67462909), (491, 41769296), (982, 20884648), (1964, 10442324), (3928, 5221162), (7856, 2610581), (9329, 2198384), (18658, 1099192), (37316, 549596), (74632, 274798), (137399, 149264)]