21260367

素因数分解:

$3^3\times {\mathrm{53}}^1\times {\mathrm{83}}^1\times {\mathrm{179}}^1$

素因数の和:324

約数の個数: 32

約数和(自身を含む): 32659200

約数和(自身を除く): 11398833

約数列:

[1, 3, 9, 27, 53, 83, 159, 179, 249, 477, 537, 747, 1431, 1611, 2241, 4399, 4833, 9487, 13197, 14857, 28461, 39591, 44571, 85383, 118773, 133713, 256149, 401139, 787421, 2362263, 7086789, 21260367]

約数ペア:

[(1, 21260367), (3, 7086789), (9, 2362263), (27, 787421), (53, 401139), (83, 256149), (159, 133713), (179, 118773), (249, 85383), (477, 44571), (537, 39591), (747, 28461), (1431, 14857), (1611, 13197), (2241, 9487), (4399, 4833)]