81322640

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{145219}}^1$

素因数の和:145239

約数の個数: 40

約数和(自身を含む): 216087360

約数和(自身を除く): 134764720

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 145219, 290438, 580876, 726095, 1016533, 1161752, 1452190, 2033066, 2323504, 2904380, 4066132, 5082665, 5808760, 8132264, 10165330, 11617520, 16264528, 20330660, 40661320, 81322640]

約数ペア:

[(1, 81322640), (2, 40661320), (4, 20330660), (5, 16264528), (7, 11617520), (8, 10165330), (10, 8132264), (14, 5808760), (16, 5082665), (20, 4066132), (28, 2904380), (35, 2323504), (40, 2033066), (56, 1452190), (70, 1161752), (80, 1016533), (112, 726095), (140, 580876), (280, 290438), (560, 145219)]