28390131

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{577}}^1$

素因数の和:672

約数の個数: 48

約数和(自身を含む): 51936768

約数和(自身を除く): 23546637

約数列:

[1, 3, 7, 9, 11, 21, 33, 63, 71, 77, 99, 213, 231, 497, 577, 639, 693, 781, 1491, 1731, 2343, 4039, 4473, 5193, 5467, 6347, 7029, 12117, 16401, 19041, 36351, 40967, 44429, 49203, 57123, 122901, 133287, 286769, 368703, 399861, 450637, 860307, 1351911, 2580921, 3154459, 4055733, 9463377, 28390131]

約数ペア:

[(1, 28390131), (3, 9463377), (7, 4055733), (9, 3154459), (11, 2580921), (21, 1351911), (33, 860307), (63, 450637), (71, 399861), (77, 368703), (99, 286769), (213, 133287), (231, 122901), (497, 57123), (577, 49203), (639, 44429), (693, 40967), (781, 36351), (1491, 19041), (1731, 16401), (2343, 12117), (4039, 7029), (4473, 6347), (5193, 5467)]