21081480

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{25097}}^1$

素因数の和:25118

約数の個数: 64

約数和(自身を含む): 72282240

約数和(自身を除く): 51200760

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840, 25097, 50194, 75291, 100388, 125485, 150582, 175679, 200776, 250970, 301164, 351358, 376455, 501940, 527037, 602328, 702716, 752910, 878395, 1003880, 1054074, 1405432, 1505820, 1756790, 2108148, 2635185, 3011640, 3513580, 4216296, 5270370, 7027160, 10540740, 21081480]

約数ペア:

[(1, 21081480), (2, 10540740), (3, 7027160), (4, 5270370), (5, 4216296), (6, 3513580), (7, 3011640), (8, 2635185), (10, 2108148), (12, 1756790), (14, 1505820), (15, 1405432), (20, 1054074), (21, 1003880), (24, 878395), (28, 752910), (30, 702716), (35, 602328), (40, 527037), (42, 501940), (56, 376455), (60, 351358), (70, 301164), (84, 250970), (105, 200776), (120, 175679), (140, 150582), (168, 125485), (210, 100388), (280, 75291), (420, 50194), (840, 25097)]