21007107

素因数分解:

$3^5\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{271}}^1$

素因数の和:326

約数の個数: 48

約数和(自身を含む): 35642880

約数和(自身を除く): 14635773

約数列:

[1, 3, 9, 11, 27, 29, 33, 81, 87, 99, 243, 261, 271, 297, 319, 783, 813, 891, 957, 2349, 2439, 2673, 2871, 2981, 7047, 7317, 7859, 8613, 8943, 21951, 23577, 25839, 26829, 65853, 70731, 77517, 80487, 86449, 212193, 241461, 259347, 636579, 724383, 778041, 1909737, 2334123, 7002369, 21007107]

約数ペア:

[(1, 21007107), (3, 7002369), (9, 2334123), (11, 1909737), (27, 778041), (29, 724383), (33, 636579), (81, 259347), (87, 241461), (99, 212193), (243, 86449), (261, 80487), (271, 77517), (297, 70731), (319, 65853), (783, 26829), (813, 25839), (891, 23577), (957, 21951), (2349, 8943), (2439, 8613), (2673, 7859), (2871, 7317), (2981, 7047)]