21018305

素因数分解:

$5^1\times 7^2\times {\mathrm{11}}^2\times {\mathrm{709}}^1$

素因数の和:750

約数の個数: 36

約数和(自身を含む): 32295060

約数和(自身を除く): 11276755

約数列:

[1, 5, 7, 11, 35, 49, 55, 77, 121, 245, 385, 539, 605, 709, 847, 2695, 3545, 4235, 4963, 5929, 7799, 24815, 29645, 34741, 38995, 54593, 85789, 173705, 272965, 382151, 428945, 600523, 1910755, 3002615, 4203661, 21018305]

約数ペア:

[(1, 21018305), (5, 4203661), (7, 3002615), (11, 1910755), (35, 600523), (49, 428945), (55, 382151), (77, 272965), (121, 173705), (245, 85789), (385, 54593), (539, 38995), (605, 34741), (709, 29645), (847, 24815), (2695, 7799), (3545, 5929), (4235, 4963)]