21573405

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{617}}^1$

素因数の和:675

約数の個数: 64

約数和(自身を含む): 45089280

約数和(自身を除く): 23515875

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 37, 45, 63, 105, 111, 135, 185, 189, 259, 315, 333, 555, 617, 777, 945, 999, 1295, 1665, 1851, 2331, 3085, 3885, 4319, 4995, 5553, 6993, 9255, 11655, 12957, 16659, 21595, 22829, 27765, 34965, 38871, 64785, 68487, 83295, 114145, 116613, 159803, 194355, 205461, 342435, 479409, 583065, 616383, 799015, 1027305, 1438227, 2397045, 3081915, 4314681, 7191135, 21573405]

約数ペア:

[(1, 21573405), (3, 7191135), (5, 4314681), (7, 3081915), (9, 2397045), (15, 1438227), (21, 1027305), (27, 799015), (35, 616383), (37, 583065), (45, 479409), (63, 342435), (105, 205461), (111, 194355), (135, 159803), (185, 116613), (189, 114145), (259, 83295), (315, 68487), (333, 64785), (555, 38871), (617, 34965), (777, 27765), (945, 22829), (999, 21595), (1295, 16659), (1665, 12957), (1851, 11655), (2331, 9255), (3085, 6993), (3885, 5553), (4319, 4995)]