20787003680

素因数分解:

$2^5\times 5^1\times {\mathrm{191}}^1\times {\mathrm{680203}}^1$

素因数の和:680409

約数の個数: 48

約数和(自身を含む): 49366485504

約数和(自身を除く): 28579481824

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 191, 382, 764, 955, 1528, 1910, 3056, 3820, 6112, 7640, 15280, 30560, 680203, 1360406, 2720812, 3401015, 5441624, 6802030, 10883248, 13604060, 21766496, 27208120, 54416240, 108832480, 129918773, 259837546, 519675092, 649593865, 1039350184, 1299187730, 2078700368, 2598375460, 4157400736, 5196750920, 10393501840, 20787003680]

約数ペア:

[(1, 20787003680), (2, 10393501840), (4, 5196750920), (5, 4157400736), (8, 2598375460), (10, 2078700368), (16, 1299187730), (20, 1039350184), (32, 649593865), (40, 519675092), (80, 259837546), (160, 129918773), (191, 108832480), (382, 54416240), (764, 27208120), (955, 21766496), (1528, 13604060), (1910, 10883248), (3056, 6802030), (3820, 5441624), (6112, 3401015), (7640, 2720812), (15280, 1360406), (30560, 680203)]