21094640

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{271}}^1$

素因数の和:430

約数の個数: 80

約数和(自身を含む): 56663040

約数和(自身を除く): 35568400

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 139, 140, 271, 278, 280, 542, 556, 560, 695, 973, 1084, 1112, 1355, 1390, 1897, 1946, 2168, 2224, 2710, 2780, 3794, 3892, 4336, 4865, 5420, 5560, 7588, 7784, 9485, 9730, 10840, 11120, 15176, 15568, 18970, 19460, 21680, 30352, 37669, 37940, 38920, 75338, 75880, 77840, 150676, 151760, 188345, 263683, 301352, 376690, 527366, 602704, 753380, 1054732, 1318415, 1506760, 2109464, 2636830, 3013520, 4218928, 5273660, 10547320, 21094640]

約数ペア:

[(1, 21094640), (2, 10547320), (4, 5273660), (5, 4218928), (7, 3013520), (8, 2636830), (10, 2109464), (14, 1506760), (16, 1318415), (20, 1054732), (28, 753380), (35, 602704), (40, 527366), (56, 376690), (70, 301352), (80, 263683), (112, 188345), (139, 151760), (140, 150676), (271, 77840), (278, 75880), (280, 75338), (542, 38920), (556, 37940), (560, 37669), (695, 30352), (973, 21680), (1084, 19460), (1112, 18970), (1355, 15568), (1390, 15176), (1897, 11120), (1946, 10840), (2168, 9730), (2224, 9485), (2710, 7784), (2780, 7588), (3794, 5560), (3892, 5420), (4336, 4865)]