21797580

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{51899}}^1$

素因数の和:51918

約数の個数: 48

約数和(自身を含む): 69753600

約数和(自身を除く): 47956020

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 51899, 103798, 155697, 207596, 259495, 311394, 363293, 518990, 622788, 726586, 778485, 1037980, 1089879, 1453172, 1556970, 1816465, 2179758, 3113940, 3632930, 4359516, 5449395, 7265860, 10898790, 21797580]

約数ペア:

[(1, 21797580), (2, 10898790), (3, 7265860), (4, 5449395), (5, 4359516), (6, 3632930), (7, 3113940), (10, 2179758), (12, 1816465), (14, 1556970), (15, 1453172), (20, 1089879), (21, 1037980), (28, 778485), (30, 726586), (35, 622788), (42, 518990), (60, 363293), (70, 311394), (84, 259495), (105, 207596), (140, 155697), (210, 103798), (420, 51899)]