21434420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{283}}^1\times {\mathrm{541}}^1$

素因数の和:840

約数の個数: 48

約数和(自身を含む): 51719808

約数和(自身を除く): 30285388

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 283, 541, 566, 1082, 1132, 1415, 1981, 2164, 2705, 2830, 3787, 3962, 5410, 5660, 7574, 7924, 9905, 10820, 15148, 18935, 19810, 37870, 39620, 75740, 153103, 306206, 612412, 765515, 1071721, 1531030, 2143442, 3062060, 4286884, 5358605, 10717210, 21434420]

約数ペア:

[(1, 21434420), (2, 10717210), (4, 5358605), (5, 4286884), (7, 3062060), (10, 2143442), (14, 1531030), (20, 1071721), (28, 765515), (35, 612412), (70, 306206), (140, 153103), (283, 75740), (541, 39620), (566, 37870), (1082, 19810), (1132, 18935), (1415, 15148), (1981, 10820), (2164, 9905), (2705, 7924), (2830, 7574), (3787, 5660), (3962, 5410)]