81363760

素因数分解:

$2^4\times 5^1\times {\mathrm{359}}^1\times {\mathrm{2833}}^1$

素因数の和:3205

約数の個数: 40

約数和(自身を含む): 189764640

約数和(自身を除く): 108400880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 359, 718, 1436, 1795, 2833, 2872, 3590, 5666, 5744, 7180, 11332, 14165, 14360, 22664, 28330, 28720, 45328, 56660, 113320, 226640, 1017047, 2034094, 4068188, 5085235, 8136376, 10170470, 16272752, 20340940, 40681880, 81363760]

約数ペア:

[(1, 81363760), (2, 40681880), (4, 20340940), (5, 16272752), (8, 10170470), (10, 8136376), (16, 5085235), (20, 4068188), (40, 2034094), (80, 1017047), (359, 226640), (718, 113320), (1436, 56660), (1795, 45328), (2833, 28720), (2872, 28330), (3590, 22664), (5666, 14360), (5744, 14165), (7180, 11332)]