18005600

素因数分解:

$2^5\times 5^2\times {\mathrm{71}}^1\times {\mathrm{317}}^1$

素因数の和:408

約数の個数: 72

約数和(自身を含む): 44715888

約数和(自身を除く): 26710288

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 71, 80, 100, 142, 160, 200, 284, 317, 355, 400, 568, 634, 710, 800, 1136, 1268, 1420, 1585, 1775, 2272, 2536, 2840, 3170, 3550, 5072, 5680, 6340, 7100, 7925, 10144, 11360, 12680, 14200, 15850, 22507, 25360, 28400, 31700, 45014, 50720, 56800, 63400, 90028, 112535, 126800, 180056, 225070, 253600, 360112, 450140, 562675, 720224, 900280, 1125350, 1800560, 2250700, 3601120, 4501400, 9002800, 18005600]

約数ペア:

[(1, 18005600), (2, 9002800), (4, 4501400), (5, 3601120), (8, 2250700), (10, 1800560), (16, 1125350), (20, 900280), (25, 720224), (32, 562675), (40, 450140), (50, 360112), (71, 253600), (80, 225070), (100, 180056), (142, 126800), (160, 112535), (200, 90028), (284, 63400), (317, 56800), (355, 50720), (400, 45014), (568, 31700), (634, 28400), (710, 25360), (800, 22507), (1136, 15850), (1268, 14200), (1420, 12680), (1585, 11360), (1775, 10144), (2272, 7925), (2536, 7100), (2840, 6340), (3170, 5680), (3550, 5072)]