21216195

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{157}}^1$

素因数の和:202

約数の個数: 128

約数和(自身を含む): 50964480

約数和(自身を除く): 29748285

約数列:

[1, 3, 5, 7, 9, 11, 13, 15, 21, 27, 33, 35, 39, 45, 55, 63, 65, 77, 91, 99, 105, 117, 135, 143, 157, 165, 189, 195, 231, 273, 297, 315, 351, 385, 429, 455, 471, 495, 585, 693, 715, 785, 819, 945, 1001, 1099, 1155, 1287, 1365, 1413, 1485, 1727, 1755, 2041, 2079, 2145, 2355, 2457, 3003, 3297, 3465, 3861, 4095, 4239, 5005, 5181, 5495, 6123, 6435, 7065, 8635, 9009, 9891, 10205, 10395, 12089, 12285, 14287, 15015, 15543, 16485, 18369, 19305, 21195, 22451, 25905, 27027, 29673, 30615, 36267, 42861, 45045, 46629, 49455, 55107, 60445, 67353, 71435, 77715, 91845, 108801, 112255, 128583, 135135, 148365, 157157, 181335, 202059, 214305, 233145, 275535, 326403, 336765, 385749, 471471, 544005, 606177, 642915, 785785, 1010295, 1414413, 1632015, 1928745, 2357355, 3030885, 4243239, 7072065, 21216195]

約数ペア:

[(1, 21216195), (3, 7072065), (5, 4243239), (7, 3030885), (9, 2357355), (11, 1928745), (13, 1632015), (15, 1414413), (21, 1010295), (27, 785785), (33, 642915), (35, 606177), (39, 544005), (45, 471471), (55, 385749), (63, 336765), (65, 326403), (77, 275535), (91, 233145), (99, 214305), (105, 202059), (117, 181335), (135, 157157), (143, 148365), (157, 135135), (165, 128583), (189, 112255), (195, 108801), (231, 91845), (273, 77715), (297, 71435), (315, 67353), (351, 60445), (385, 55107), (429, 49455), (455, 46629), (471, 45045), (495, 42861), (585, 36267), (693, 30615), (715, 29673), (785, 27027), (819, 25905), (945, 22451), (1001, 21195), (1099, 19305), (1155, 18369), (1287, 16485), (1365, 15543), (1413, 15015), (1485, 14287), (1727, 12285), (1755, 12089), (2041, 10395), (2079, 10205), (2145, 9891), (2355, 9009), (2457, 8635), (3003, 7065), (3297, 6435), (3465, 6123), (3861, 5495), (4095, 5181), (4239, 5005)]