21990959991

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{221909}}^1$

素因数の和:221957

約数の個数: 72

約数和(自身を含む): 42972427680

約数和(自身を除く): 20981467689

約数列:

[1, 3, 7, 9, 11, 13, 21, 33, 39, 63, 77, 91, 99, 117, 121, 143, 231, 273, 363, 429, 693, 819, 847, 1001, 1089, 1287, 1573, 2541, 3003, 4719, 7623, 9009, 11011, 14157, 33033, 99099, 221909, 665727, 1553363, 1997181, 2440999, 2884817, 4660089, 7322997, 8654451, 13980267, 17086993, 20193719, 21968991, 25963353, 26850989, 31732987, 51260979, 60581157, 80552967, 95198961, 153782937, 181743471, 187956923, 222130909, 241658901, 285596883, 349062857, 563870769, 666392727, 1047188571, 1691612307, 1999178181, 2443439999, 3141565713, 7330319997, 21990959991]

約数ペア:

[(1, 21990959991), (3, 7330319997), (7, 3141565713), (9, 2443439999), (11, 1999178181), (13, 1691612307), (21, 1047188571), (33, 666392727), (39, 563870769), (63, 349062857), (77, 285596883), (91, 241658901), (99, 222130909), (117, 187956923), (121, 181743471), (143, 153782937), (231, 95198961), (273, 80552967), (363, 60581157), (429, 51260979), (693, 31732987), (819, 26850989), (847, 25963353), (1001, 21968991), (1089, 20193719), (1287, 17086993), (1573, 13980267), (2541, 8654451), (3003, 7322997), (4719, 4660089), (7623, 2884817), (9009, 2440999), (11011, 1997181), (14157, 1553363), (33033, 665727), (99099, 221909)]