21320128

素因数分解:

$2^6\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{197}}^1$

素因数の和:317

約数の個数: 56

約数和(自身を含む): 45262800

約数和(自身を除く): 23942672

約数列:

[1, 2, 4, 8, 16, 19, 32, 38, 64, 76, 89, 152, 178, 197, 304, 356, 394, 608, 712, 788, 1216, 1424, 1576, 1691, 2848, 3152, 3382, 3743, 5696, 6304, 6764, 7486, 12608, 13528, 14972, 17533, 27056, 29944, 35066, 54112, 59888, 70132, 108224, 119776, 140264, 239552, 280528, 333127, 561056, 666254, 1122112, 1332508, 2665016, 5330032, 10660064, 21320128]

約数ペア:

[(1, 21320128), (2, 10660064), (4, 5330032), (8, 2665016), (16, 1332508), (19, 1122112), (32, 666254), (38, 561056), (64, 333127), (76, 280528), (89, 239552), (152, 140264), (178, 119776), (197, 108224), (304, 70132), (356, 59888), (394, 54112), (608, 35066), (712, 29944), (788, 27056), (1216, 17533), (1424, 14972), (1576, 13528), (1691, 12608), (2848, 7486), (3152, 6764), (3382, 6304), (3743, 5696)]