21647968

素因数分解:

$2^5\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{439}}^1$

素因数の和:539

約数の個数: 48

約数和(自身を含む): 45239040

約数和(自身を除く): 23591072

約数列:

[1, 2, 4, 8, 16, 23, 32, 46, 67, 92, 134, 184, 268, 368, 439, 536, 736, 878, 1072, 1541, 1756, 2144, 3082, 3512, 6164, 7024, 10097, 12328, 14048, 20194, 24656, 29413, 40388, 49312, 58826, 80776, 117652, 161552, 235304, 323104, 470608, 676499, 941216, 1352998, 2705996, 5411992, 10823984, 21647968]

約数ペア:

[(1, 21647968), (2, 10823984), (4, 5411992), (8, 2705996), (16, 1352998), (23, 941216), (32, 676499), (46, 470608), (67, 323104), (92, 235304), (134, 161552), (184, 117652), (268, 80776), (368, 58826), (439, 49312), (536, 40388), (736, 29413), (878, 24656), (1072, 20194), (1541, 14048), (1756, 12328), (2144, 10097), (3082, 7024), (3512, 6164)]