20681920

素因数分解:

$2^6\times 5^1\times 7^2\times {\mathrm{1319}}^1$

素因数の和:1350

約数の個数: 84

約数和(自身を含む): 57332880

約数和(自身を除く): 36650960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 49, 56, 64, 70, 80, 98, 112, 140, 160, 196, 224, 245, 280, 320, 392, 448, 490, 560, 784, 980, 1120, 1319, 1568, 1960, 2240, 2638, 3136, 3920, 5276, 6595, 7840, 9233, 10552, 13190, 15680, 18466, 21104, 26380, 36932, 42208, 46165, 52760, 64631, 73864, 84416, 92330, 105520, 129262, 147728, 184660, 211040, 258524, 295456, 323155, 369320, 422080, 517048, 590912, 646310, 738640, 1034096, 1292620, 1477280, 2068192, 2585240, 2954560, 4136384, 5170480, 10340960, 20681920]

約数ペア:

[(1, 20681920), (2, 10340960), (4, 5170480), (5, 4136384), (7, 2954560), (8, 2585240), (10, 2068192), (14, 1477280), (16, 1292620), (20, 1034096), (28, 738640), (32, 646310), (35, 590912), (40, 517048), (49, 422080), (56, 369320), (64, 323155), (70, 295456), (80, 258524), (98, 211040), (112, 184660), (140, 147728), (160, 129262), (196, 105520), (224, 92330), (245, 84416), (280, 73864), (320, 64631), (392, 52760), (448, 46165), (490, 42208), (560, 36932), (784, 26380), (980, 21104), (1120, 18466), (1319, 15680), (1568, 13190), (1960, 10552), (2240, 9233), (2638, 7840), (3136, 6595), (3920, 5276)]