21678976

素因数分解:

$2^7\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{173}}^1$

素因数の和:287

約数の個数: 64

約数和(自身を含む): 47919600

約数和(自身を除く): 26240624

約数列:

[1, 2, 4, 8, 11, 16, 22, 32, 44, 64, 88, 89, 128, 173, 176, 178, 346, 352, 356, 692, 704, 712, 979, 1384, 1408, 1424, 1903, 1958, 2768, 2848, 3806, 3916, 5536, 5696, 7612, 7832, 11072, 11392, 15224, 15397, 15664, 22144, 30448, 30794, 31328, 60896, 61588, 62656, 121792, 123176, 125312, 169367, 243584, 246352, 338734, 492704, 677468, 985408, 1354936, 1970816, 2709872, 5419744, 10839488, 21678976]

約数ペア:

[(1, 21678976), (2, 10839488), (4, 5419744), (8, 2709872), (11, 1970816), (16, 1354936), (22, 985408), (32, 677468), (44, 492704), (64, 338734), (88, 246352), (89, 243584), (128, 169367), (173, 125312), (176, 123176), (178, 121792), (346, 62656), (352, 61588), (356, 60896), (692, 31328), (704, 30794), (712, 30448), (979, 22144), (1384, 15664), (1408, 15397), (1424, 15224), (1903, 11392), (1958, 11072), (2768, 7832), (2848, 7612), (3806, 5696), (3916, 5536)]