21057180

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{4943}}^1$

素因数の和:5026

約数の個数: 48

約数和(自身を含む): 59802624

約数和(自身を除く): 38745444

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 71, 142, 213, 284, 355, 426, 710, 852, 1065, 1420, 2130, 4260, 4943, 9886, 14829, 19772, 24715, 29658, 49430, 59316, 74145, 98860, 148290, 296580, 350953, 701906, 1052859, 1403812, 1754765, 2105718, 3509530, 4211436, 5264295, 7019060, 10528590, 21057180]

約数ペア:

[(1, 21057180), (2, 10528590), (3, 7019060), (4, 5264295), (5, 4211436), (6, 3509530), (10, 2105718), (12, 1754765), (15, 1403812), (20, 1052859), (30, 701906), (60, 350953), (71, 296580), (142, 148290), (213, 98860), (284, 74145), (355, 59316), (426, 49430), (710, 29658), (852, 24715), (1065, 19772), (1420, 14829), (2130, 9886), (4260, 4943)]