20789984

素因数分解:

$2^5\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{521}}^1$

素因数の和:603

約数の個数: 48

約数和(自身を含む): 43409520

約数和(自身を除く): 22619536

約数列:

[1, 2, 4, 8, 16, 29, 32, 43, 58, 86, 116, 172, 232, 344, 464, 521, 688, 928, 1042, 1247, 1376, 2084, 2494, 4168, 4988, 8336, 9976, 15109, 16672, 19952, 22403, 30218, 39904, 44806, 60436, 89612, 120872, 179224, 241744, 358448, 483488, 649687, 716896, 1299374, 2598748, 5197496, 10394992, 20789984]

約数ペア:

[(1, 20789984), (2, 10394992), (4, 5197496), (8, 2598748), (16, 1299374), (29, 716896), (32, 649687), (43, 483488), (58, 358448), (86, 241744), (116, 179224), (172, 120872), (232, 89612), (344, 60436), (464, 44806), (521, 39904), (688, 30218), (928, 22403), (1042, 19952), (1247, 16672), (1376, 15109), (2084, 9976), (2494, 8336), (4168, 4988)]