20971580

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{163}}^1\times {\mathrm{919}}^1$

素因数の和:1098

約数の個数: 48

約数和(自身を含む): 50695680

約数和(自身を除く): 29724100

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 163, 326, 652, 815, 919, 1141, 1630, 1838, 2282, 3260, 3676, 4564, 4595, 5705, 6433, 9190, 11410, 12866, 18380, 22820, 25732, 32165, 64330, 128660, 149797, 299594, 599188, 748985, 1048579, 1497970, 2097158, 2995940, 4194316, 5242895, 10485790, 20971580]

約数ペア:

[(1, 20971580), (2, 10485790), (4, 5242895), (5, 4194316), (7, 2995940), (10, 2097158), (14, 1497970), (20, 1048579), (28, 748985), (35, 599188), (70, 299594), (140, 149797), (163, 128660), (326, 64330), (652, 32165), (815, 25732), (919, 22820), (1141, 18380), (1630, 12866), (1838, 11410), (2282, 9190), (3260, 6433), (3676, 5705), (4564, 4595)]