21977109

素因数分解:

$3^3\times 7^1\times {\mathrm{11}}^2\times {\mathrm{31}}^2$

素因数の和:100

約数の個数: 72

約数和(自身を含む): 42262080

約数和(自身を除く): 20284971

約数列:

[1, 3, 7, 9, 11, 21, 27, 31, 33, 63, 77, 93, 99, 121, 189, 217, 231, 279, 297, 341, 363, 651, 693, 837, 847, 961, 1023, 1089, 1953, 2079, 2387, 2541, 2883, 3069, 3267, 3751, 5859, 6727, 7161, 7623, 8649, 9207, 10571, 11253, 20181, 21483, 22869, 25947, 26257, 31713, 33759, 60543, 64449, 73997, 78771, 95139, 101277, 116281, 181629, 221991, 236313, 285417, 348843, 665973, 708939, 813967, 1046529, 1997919, 2441901, 3139587, 7325703, 21977109]

約数ペア:

[(1, 21977109), (3, 7325703), (7, 3139587), (9, 2441901), (11, 1997919), (21, 1046529), (27, 813967), (31, 708939), (33, 665973), (63, 348843), (77, 285417), (93, 236313), (99, 221991), (121, 181629), (189, 116281), (217, 101277), (231, 95139), (279, 78771), (297, 73997), (341, 64449), (363, 60543), (651, 33759), (693, 31713), (837, 26257), (847, 25947), (961, 22869), (1023, 21483), (1089, 20181), (1953, 11253), (2079, 10571), (2387, 9207), (2541, 8649), (2883, 7623), (3069, 7161), (3267, 6727), (3751, 5859)]