21275840

素因数分解:

$2^6\times 5^1\times {\mathrm{17}}^1\times {\mathrm{3911}}^1$

素因数の和:3945

約数の個数: 56

約数和(自身を含む): 53656992

約数和(自身を除く): 32381152

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 64, 68, 80, 85, 136, 160, 170, 272, 320, 340, 544, 680, 1088, 1360, 2720, 3911, 5440, 7822, 15644, 19555, 31288, 39110, 62576, 66487, 78220, 125152, 132974, 156440, 250304, 265948, 312880, 332435, 531896, 625760, 664870, 1063792, 1251520, 1329740, 2127584, 2659480, 4255168, 5318960, 10637920, 21275840]

約数ペア:

[(1, 21275840), (2, 10637920), (4, 5318960), (5, 4255168), (8, 2659480), (10, 2127584), (16, 1329740), (17, 1251520), (20, 1063792), (32, 664870), (34, 625760), (40, 531896), (64, 332435), (68, 312880), (80, 265948), (85, 250304), (136, 156440), (160, 132974), (170, 125152), (272, 78220), (320, 66487), (340, 62576), (544, 39110), (680, 31288), (1088, 19555), (1360, 15644), (2720, 7822), (3911, 5440)]