21381904

素因数分解:

$2^4\times {\mathrm{23}}^1\times {\mathrm{97}}^1\times {\mathrm{599}}^1$

素因数の和:727

約数の個数: 40

約数和(自身を含む): 43747200

約数和(自身を除く): 22365296

約数列:

[1, 2, 4, 8, 16, 23, 46, 92, 97, 184, 194, 368, 388, 599, 776, 1198, 1552, 2231, 2396, 4462, 4792, 8924, 9584, 13777, 17848, 27554, 35696, 55108, 58103, 110216, 116206, 220432, 232412, 464824, 929648, 1336369, 2672738, 5345476, 10690952, 21381904]

約数ペア:

[(1, 21381904), (2, 10690952), (4, 5345476), (8, 2672738), (16, 1336369), (23, 929648), (46, 464824), (92, 232412), (97, 220432), (184, 116206), (194, 110216), (368, 58103), (388, 55108), (599, 35696), (776, 27554), (1198, 17848), (1552, 13777), (2231, 9584), (2396, 8924), (4462, 4792)]