21207760

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{37871}}^1$

素因数の和:37891

約数の個数: 40

約数和(自身を含む): 56353536

約数和(自身を除く): 35145776

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 37871, 75742, 151484, 189355, 265097, 302968, 378710, 530194, 605936, 757420, 1060388, 1325485, 1514840, 2120776, 2650970, 3029680, 4241552, 5301940, 10603880, 21207760]

約数ペア:

[(1, 21207760), (2, 10603880), (4, 5301940), (5, 4241552), (7, 3029680), (8, 2650970), (10, 2120776), (14, 1514840), (16, 1325485), (20, 1060388), (28, 757420), (35, 605936), (40, 530194), (56, 378710), (70, 302968), (80, 265097), (112, 189355), (140, 151484), (280, 75742), (560, 37871)]