21189315

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{127}}^1\times {\mathrm{227}}^1$

素因数の和:376

約数の個数: 48

約数和(自身を含む): 39923712

約数和(自身を除く): 18734397

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 105, 127, 147, 227, 245, 381, 635, 681, 735, 889, 1135, 1589, 1905, 2667, 3405, 4445, 4767, 6223, 7945, 11123, 13335, 18669, 23835, 28829, 31115, 33369, 55615, 86487, 93345, 144145, 166845, 201803, 432435, 605409, 1009015, 1412621, 3027045, 4237863, 7063105, 21189315]

約数ペア:

[(1, 21189315), (3, 7063105), (5, 4237863), (7, 3027045), (15, 1412621), (21, 1009015), (35, 605409), (49, 432435), (105, 201803), (127, 166845), (147, 144145), (227, 93345), (245, 86487), (381, 55615), (635, 33369), (681, 31115), (735, 28829), (889, 23835), (1135, 18669), (1589, 13335), (1905, 11123), (2667, 7945), (3405, 6223), (4445, 4767)]