21705236

素因数分解:

$2^2\times 7^2\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{73}}^1$

素因数の和:169

約数の個数: 72

約数和(自身を含む): 47123496

約数和(自身を除く): 25418260

約数列:

[1, 2, 4, 7, 14, 28, 37, 41, 49, 73, 74, 82, 98, 146, 148, 164, 196, 259, 287, 292, 511, 518, 574, 1022, 1036, 1148, 1517, 1813, 2009, 2044, 2701, 2993, 3034, 3577, 3626, 4018, 5402, 5986, 6068, 7154, 7252, 8036, 10619, 10804, 11972, 14308, 18907, 20951, 21238, 37814, 41902, 42476, 74333, 75628, 83804, 110741, 132349, 146657, 148666, 221482, 264698, 293314, 297332, 442964, 529396, 586628, 775187, 1550374, 3100748, 5426309, 10852618, 21705236]

約数ペア:

[(1, 21705236), (2, 10852618), (4, 5426309), (7, 3100748), (14, 1550374), (28, 775187), (37, 586628), (41, 529396), (49, 442964), (73, 297332), (74, 293314), (82, 264698), (98, 221482), (146, 148666), (148, 146657), (164, 132349), (196, 110741), (259, 83804), (287, 75628), (292, 74333), (511, 42476), (518, 41902), (574, 37814), (1022, 21238), (1036, 20951), (1148, 18907), (1517, 14308), (1813, 11972), (2009, 10804), (2044, 10619), (2701, 8036), (2993, 7252), (3034, 7154), (3577, 6068), (3626, 5986), (4018, 5402)]