81045020

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{82699}}^1$

素因数の和:82722

約数の個数: 36

約数和(自身を含む): 197983800

約数和(自身を除く): 116938780

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 82699, 165398, 330796, 413495, 578893, 826990, 1157786, 1653980, 2315572, 2894465, 4052251, 5788930, 8104502, 11577860, 16209004, 20261255, 40522510, 81045020]

約数ペア:

[(1, 81045020), (2, 40522510), (4, 20261255), (5, 16209004), (7, 11577860), (10, 8104502), (14, 5788930), (20, 4052251), (28, 2894465), (35, 2315572), (49, 1653980), (70, 1157786), (98, 826990), (140, 578893), (196, 413495), (245, 330796), (490, 165398), (980, 82699)]