21400288

素因数分解:

$2^5\times 7^1\times {\mathrm{13}}^1\times {\mathrm{7349}}^1$

素因数の和:7379

約数の個数: 48

約数和(自身を含む): 51861600

約数和(自身を除く): 30461312

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 32, 52, 56, 91, 104, 112, 182, 208, 224, 364, 416, 728, 1456, 2912, 7349, 14698, 29396, 51443, 58792, 95537, 102886, 117584, 191074, 205772, 235168, 382148, 411544, 668759, 764296, 823088, 1337518, 1528592, 1646176, 2675036, 3057184, 5350072, 10700144, 21400288]

約数ペア:

[(1, 21400288), (2, 10700144), (4, 5350072), (7, 3057184), (8, 2675036), (13, 1646176), (14, 1528592), (16, 1337518), (26, 823088), (28, 764296), (32, 668759), (52, 411544), (56, 382148), (91, 235168), (104, 205772), (112, 191074), (182, 117584), (208, 102886), (224, 95537), (364, 58792), (416, 51443), (728, 29396), (1456, 14698), (2912, 7349)]