31761880

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{107}}^1\times {\mathrm{181}}^1$

素因数の和:340

約数の個数: 64

約数和(自身を含む): 74299680

約数和(自身を除く): 42537800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 107, 164, 181, 205, 214, 328, 362, 410, 428, 535, 724, 820, 856, 905, 1070, 1448, 1640, 1810, 2140, 3620, 4280, 4387, 7240, 7421, 8774, 14842, 17548, 19367, 21935, 29684, 35096, 37105, 38734, 43870, 59368, 74210, 77468, 87740, 96835, 148420, 154936, 175480, 193670, 296840, 387340, 774680, 794047, 1588094, 3176188, 3970235, 6352376, 7940470, 15880940, 31761880]

約数ペア:

[(1, 31761880), (2, 15880940), (4, 7940470), (5, 6352376), (8, 3970235), (10, 3176188), (20, 1588094), (40, 794047), (41, 774680), (82, 387340), (107, 296840), (164, 193670), (181, 175480), (205, 154936), (214, 148420), (328, 96835), (362, 87740), (410, 77468), (428, 74210), (535, 59368), (724, 43870), (820, 38734), (856, 37105), (905, 35096), (1070, 29684), (1448, 21935), (1640, 19367), (1810, 17548), (2140, 14842), (3620, 8774), (4280, 7421), (4387, 7240)]