20820380

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{1171}}^1$

素因数の和:1314

約数の個数: 48

約数和(自身を含む): 50405376

約数和(自身を除く): 29584996

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 127, 140, 254, 508, 635, 889, 1171, 1270, 1778, 2342, 2540, 3556, 4445, 4684, 5855, 8197, 8890, 11710, 16394, 17780, 23420, 32788, 40985, 81970, 148717, 163940, 297434, 594868, 743585, 1041019, 1487170, 2082038, 2974340, 4164076, 5205095, 10410190, 20820380]

約数ペア:

[(1, 20820380), (2, 10410190), (4, 5205095), (5, 4164076), (7, 2974340), (10, 2082038), (14, 1487170), (20, 1041019), (28, 743585), (35, 594868), (70, 297434), (127, 163940), (140, 148717), (254, 81970), (508, 40985), (635, 32788), (889, 23420), (1171, 17780), (1270, 16394), (1778, 11710), (2342, 8890), (2540, 8197), (3556, 5855), (4445, 4684)]