20781264

素因数分解:

$2^4\times 3^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{487}}^1$

素因数の和:632

約数の個数: 80

約数和(自身を含む): 61964288

約数和(自身を除く): 41183024

約数列:

[1, 2, 3, 4, 6, 7, 8, 12, 14, 16, 21, 24, 28, 42, 48, 56, 84, 112, 127, 168, 254, 336, 381, 487, 508, 762, 889, 974, 1016, 1461, 1524, 1778, 1948, 2032, 2667, 2922, 3048, 3409, 3556, 3896, 5334, 5844, 6096, 6818, 7112, 7792, 10227, 10668, 11688, 13636, 14224, 20454, 21336, 23376, 27272, 40908, 42672, 54544, 61849, 81816, 123698, 163632, 185547, 247396, 371094, 432943, 494792, 742188, 865886, 989584, 1298829, 1484376, 1731772, 2597658, 2968752, 3463544, 5195316, 6927088, 10390632, 20781264]

約数ペア:

[(1, 20781264), (2, 10390632), (3, 6927088), (4, 5195316), (6, 3463544), (7, 2968752), (8, 2597658), (12, 1731772), (14, 1484376), (16, 1298829), (21, 989584), (24, 865886), (28, 742188), (42, 494792), (48, 432943), (56, 371094), (84, 247396), (112, 185547), (127, 163632), (168, 123698), (254, 81816), (336, 61849), (381, 54544), (487, 42672), (508, 40908), (762, 27272), (889, 23376), (974, 21336), (1016, 20454), (1461, 14224), (1524, 13636), (1778, 11688), (1948, 10668), (2032, 10227), (2667, 7792), (2922, 7112), (3048, 6818), (3409, 6096), (3556, 5844), (3896, 5334)]