21809025

素因数分解:

$3^2\times 5^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{227}}^1$

素因数の和:311

約数の個数: 72

約数和(自身を含む): 45574464

約数和(自身を除く): 23765439

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 35, 45, 61, 63, 75, 105, 175, 183, 225, 227, 305, 315, 427, 525, 549, 681, 915, 1135, 1281, 1525, 1575, 1589, 2043, 2135, 2745, 3405, 3843, 4575, 4767, 5675, 6405, 7945, 10215, 10675, 13725, 13847, 14301, 17025, 19215, 23835, 32025, 39725, 41541, 51075, 69235, 71505, 96075, 96929, 119175, 124623, 207705, 290787, 346175, 357525, 484645, 623115, 872361, 1038525, 1453935, 2423225, 3115575, 4361805, 7269675, 21809025]

約数ペア:

[(1, 21809025), (3, 7269675), (5, 4361805), (7, 3115575), (9, 2423225), (15, 1453935), (21, 1038525), (25, 872361), (35, 623115), (45, 484645), (61, 357525), (63, 346175), (75, 290787), (105, 207705), (175, 124623), (183, 119175), (225, 96929), (227, 96075), (305, 71505), (315, 69235), (427, 51075), (525, 41541), (549, 39725), (681, 32025), (915, 23835), (1135, 19215), (1281, 17025), (1525, 14301), (1575, 13847), (1589, 13725), (2043, 10675), (2135, 10215), (2745, 7945), (3405, 6405), (3843, 5675), (4575, 4767)]