21866355

素因数分解:

$3^6\times 5^1\times 7^1\times {\mathrm{857}}^1$

素因数の和:887

約数の個数: 56

約数和(自身を含む): 45014112

約数和(自身を除く): 23147757

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 81, 105, 135, 189, 243, 315, 405, 567, 729, 857, 945, 1215, 1701, 2571, 2835, 3645, 4285, 5103, 5999, 7713, 8505, 12855, 17997, 23139, 25515, 29995, 38565, 53991, 69417, 89985, 115695, 161973, 208251, 269955, 347085, 485919, 624753, 809865, 1041255, 1457757, 2429595, 3123765, 4373271, 7288785, 21866355]

約数ペア:

[(1, 21866355), (3, 7288785), (5, 4373271), (7, 3123765), (9, 2429595), (15, 1457757), (21, 1041255), (27, 809865), (35, 624753), (45, 485919), (63, 347085), (81, 269955), (105, 208251), (135, 161973), (189, 115695), (243, 89985), (315, 69417), (405, 53991), (567, 38565), (729, 29995), (857, 25515), (945, 23139), (1215, 17997), (1701, 12855), (2571, 8505), (2835, 7713), (3645, 5999), (4285, 5103)]