20851380

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{10531}}^1$

素因数の和:10557

約数の個数: 72

約数和(自身を含む): 69005664

約数和(自身を除く): 48154284

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 30, 33, 36, 44, 45, 55, 60, 66, 90, 99, 110, 132, 165, 180, 198, 220, 330, 396, 495, 660, 990, 1980, 10531, 21062, 31593, 42124, 52655, 63186, 94779, 105310, 115841, 126372, 157965, 189558, 210620, 231682, 315930, 347523, 379116, 463364, 473895, 579205, 631860, 695046, 947790, 1042569, 1158410, 1390092, 1737615, 1895580, 2085138, 2316820, 3475230, 4170276, 5212845, 6950460, 10425690, 20851380]

約数ペア:

[(1, 20851380), (2, 10425690), (3, 6950460), (4, 5212845), (5, 4170276), (6, 3475230), (9, 2316820), (10, 2085138), (11, 1895580), (12, 1737615), (15, 1390092), (18, 1158410), (20, 1042569), (22, 947790), (30, 695046), (33, 631860), (36, 579205), (44, 473895), (45, 463364), (55, 379116), (60, 347523), (66, 315930), (90, 231682), (99, 210620), (110, 189558), (132, 157965), (165, 126372), (180, 115841), (198, 105310), (220, 94779), (330, 63186), (396, 52655), (495, 42124), (660, 31593), (990, 21062), (1980, 10531)]