21418419

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{523}}^1$

素因数の和:627

約数の個数: 32

約数和(自身を含む): 33502464

約数和(自身を除く): 12084045

約数列:

[1, 3, 11, 17, 33, 51, 73, 187, 219, 523, 561, 803, 1241, 1569, 2409, 3723, 5753, 8891, 13651, 17259, 26673, 38179, 40953, 97801, 114537, 293403, 419969, 649043, 1259907, 1947129, 7139473, 21418419]

約数ペア:

[(1, 21418419), (3, 7139473), (11, 1947129), (17, 1259907), (33, 649043), (51, 419969), (73, 293403), (187, 114537), (219, 97801), (523, 40953), (561, 38179), (803, 26673), (1241, 17259), (1569, 13651), (2409, 8891), (3723, 5753)]