21372428

素因数分解:

$2^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{431}}^1$

素因数の和:483

約数の個数: 72

約数和(自身を含む): 49641984

約数和(自身を除く): 28269556

約数列:

[1, 2, 4, 7, 11, 14, 22, 23, 28, 44, 46, 49, 77, 92, 98, 154, 161, 196, 253, 308, 322, 431, 506, 539, 644, 862, 1012, 1078, 1127, 1724, 1771, 2156, 2254, 3017, 3542, 4508, 4741, 6034, 7084, 9482, 9913, 12068, 12397, 18964, 19826, 21119, 24794, 33187, 39652, 42238, 49588, 66374, 69391, 84476, 109043, 132748, 138782, 218086, 232309, 277564, 436172, 464618, 485737, 763301, 929236, 971474, 1526602, 1942948, 3053204, 5343107, 10686214, 21372428]

約数ペア:

[(1, 21372428), (2, 10686214), (4, 5343107), (7, 3053204), (11, 1942948), (14, 1526602), (22, 971474), (23, 929236), (28, 763301), (44, 485737), (46, 464618), (49, 436172), (77, 277564), (92, 232309), (98, 218086), (154, 138782), (161, 132748), (196, 109043), (253, 84476), (308, 69391), (322, 66374), (431, 49588), (506, 42238), (539, 39652), (644, 33187), (862, 24794), (1012, 21119), (1078, 19826), (1127, 18964), (1724, 12397), (1771, 12068), (2156, 9913), (2254, 9482), (3017, 7084), (3542, 6034), (4508, 4741)]