161813720

素因数分解:

$2^3\times 5^1\times {\mathrm{1297}}^1\times {\mathrm{3119}}^1$

素因数の和:4427

約数の個数: 32

約数和(自身を含む): 364478400

約数和(自身を除く): 202664680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1297, 2594, 3119, 5188, 6238, 6485, 10376, 12476, 12970, 15595, 24952, 25940, 31190, 51880, 62380, 124760, 4045343, 8090686, 16181372, 20226715, 32362744, 40453430, 80906860, 161813720]

約数ペア:

[(1, 161813720), (2, 80906860), (4, 40453430), (5, 32362744), (8, 20226715), (10, 16181372), (20, 8090686), (40, 4045343), (1297, 124760), (2594, 62380), (3119, 51880), (5188, 31190), (6238, 25940), (6485, 24952), (10376, 15595), (12476, 12970)]