21259705

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{223}}^1\times {\mathrm{829}}^1$

素因数の和:1080

約数の個数: 16

約数和(自身を含む): 26772480

約数和(自身を除く): 5512775

約数列:

[1, 5, 23, 115, 223, 829, 1115, 4145, 5129, 19067, 25645, 95335, 184867, 924335, 4251941, 21259705]

約数ペア:

[(1, 21259705), (5, 4251941), (23, 924335), (115, 184867), (223, 95335), (829, 25645), (1115, 19067), (4145, 5129)]