20921956

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{67}}^1\times {\mathrm{151}}^1$

素因数の和:280

約数の個数: 48

約数和(自身を含む): 41674752

約数和(自身を除く): 20752796

約数列:

[1, 2, 4, 11, 22, 44, 47, 67, 94, 134, 151, 188, 268, 302, 517, 604, 737, 1034, 1474, 1661, 2068, 2948, 3149, 3322, 6298, 6644, 7097, 10117, 12596, 14194, 20234, 28388, 34639, 40468, 69278, 78067, 111287, 138556, 156134, 222574, 312268, 445148, 475499, 950998, 1901996, 5230489, 10460978, 20921956]

約数ペア:

[(1, 20921956), (2, 10460978), (4, 5230489), (11, 1901996), (22, 950998), (44, 475499), (47, 445148), (67, 312268), (94, 222574), (134, 156134), (151, 138556), (188, 111287), (268, 78067), (302, 69278), (517, 40468), (604, 34639), (737, 28388), (1034, 20234), (1474, 14194), (1661, 12596), (2068, 10117), (2948, 7097), (3149, 6644), (3322, 6298)]