21342320

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^2\times {\mathrm{739}}^1$

素因数の和:790

約数の個数: 60

約数和(自身を含む): 52440840

約数和(自身を除く): 31098520

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 361, 380, 722, 739, 760, 1444, 1478, 1520, 1805, 2888, 2956, 3610, 3695, 5776, 5912, 7220, 7390, 11824, 14041, 14440, 14780, 28082, 28880, 29560, 56164, 59120, 70205, 112328, 140410, 224656, 266779, 280820, 533558, 561640, 1067116, 1123280, 1333895, 2134232, 2667790, 4268464, 5335580, 10671160, 21342320]

約数ペア:

[(1, 21342320), (2, 10671160), (4, 5335580), (5, 4268464), (8, 2667790), (10, 2134232), (16, 1333895), (19, 1123280), (20, 1067116), (38, 561640), (40, 533558), (76, 280820), (80, 266779), (95, 224656), (152, 140410), (190, 112328), (304, 70205), (361, 59120), (380, 56164), (722, 29560), (739, 28880), (760, 28082), (1444, 14780), (1478, 14440), (1520, 14041), (1805, 11824), (2888, 7390), (2956, 7220), (3610, 5912), (3695, 5776)]