81115280

素因数分解:

$2^4\times 5^1\times {\mathrm{97}}^1\times {\mathrm{10453}}^1$

素因数の和:10563

約数の個数: 40

約数和(自身を含む): 190555512

約数和(自身を除く): 109440232

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 97, 194, 388, 485, 776, 970, 1552, 1940, 3880, 7760, 10453, 20906, 41812, 52265, 83624, 104530, 167248, 209060, 418120, 836240, 1013941, 2027882, 4055764, 5069705, 8111528, 10139410, 16223056, 20278820, 40557640, 81115280]

約数ペア:

[(1, 81115280), (2, 40557640), (4, 20278820), (5, 16223056), (8, 10139410), (10, 8111528), (16, 5069705), (20, 4055764), (40, 2027882), (80, 1013941), (97, 836240), (194, 418120), (388, 209060), (485, 167248), (776, 104530), (970, 83624), (1552, 52265), (1940, 41812), (3880, 20906), (7760, 10453)]