21521535

素因数分解:

$3^1\times 5^1\times 7^3\times {\mathrm{47}}^1\times {\mathrm{89}}^1$

素因数の和:165

約数の個数: 64

約数和(自身を含む): 41472000

約数和(自身を除く): 19950465

約数列:

[1, 3, 5, 7, 15, 21, 35, 47, 49, 89, 105, 141, 147, 235, 245, 267, 329, 343, 445, 623, 705, 735, 987, 1029, 1335, 1645, 1715, 1869, 2303, 3115, 4183, 4361, 4935, 5145, 6909, 9345, 11515, 12549, 13083, 16121, 20915, 21805, 29281, 30527, 34545, 48363, 62745, 65415, 80605, 87843, 91581, 146405, 152635, 204967, 241815, 439215, 457905, 614901, 1024835, 1434769, 3074505, 4304307, 7173845, 21521535]

約数ペア:

[(1, 21521535), (3, 7173845), (5, 4304307), (7, 3074505), (15, 1434769), (21, 1024835), (35, 614901), (47, 457905), (49, 439215), (89, 241815), (105, 204967), (141, 152635), (147, 146405), (235, 91581), (245, 87843), (267, 80605), (329, 65415), (343, 62745), (445, 48363), (623, 34545), (705, 30527), (735, 29281), (987, 21805), (1029, 20915), (1335, 16121), (1645, 13083), (1715, 12549), (1869, 11515), (2303, 9345), (3115, 6909), (4183, 5145), (4361, 4935)]