21100240

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{919}}^1$

素因数の和:980

約数の個数: 80

約数和(自身を含む): 57496320

約数和(自身を除く): 36396080

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 41, 56, 70, 80, 82, 112, 140, 164, 205, 280, 287, 328, 410, 560, 574, 656, 820, 919, 1148, 1435, 1640, 1838, 2296, 2870, 3280, 3676, 4592, 4595, 5740, 6433, 7352, 9190, 11480, 12866, 14704, 18380, 22960, 25732, 32165, 36760, 37679, 51464, 64330, 73520, 75358, 102928, 128660, 150716, 188395, 257320, 263753, 301432, 376790, 514640, 527506, 602864, 753580, 1055012, 1318765, 1507160, 2110024, 2637530, 3014320, 4220048, 5275060, 10550120, 21100240]

約数ペア:

[(1, 21100240), (2, 10550120), (4, 5275060), (5, 4220048), (7, 3014320), (8, 2637530), (10, 2110024), (14, 1507160), (16, 1318765), (20, 1055012), (28, 753580), (35, 602864), (40, 527506), (41, 514640), (56, 376790), (70, 301432), (80, 263753), (82, 257320), (112, 188395), (140, 150716), (164, 128660), (205, 102928), (280, 75358), (287, 73520), (328, 64330), (410, 51464), (560, 37679), (574, 36760), (656, 32165), (820, 25732), (919, 22960), (1148, 18380), (1435, 14704), (1640, 12866), (1838, 11480), (2296, 9190), (2870, 7352), (3280, 6433), (3676, 5740), (4592, 4595)]