21548945

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{1213}}^1$

素因数の和:1265

約数の個数: 32

約数和(自身を含む): 31466880

約数和(自身を除く): 9917935

約数列:

[1, 5, 11, 17, 19, 55, 85, 95, 187, 209, 323, 935, 1045, 1213, 1615, 3553, 6065, 13343, 17765, 20621, 23047, 66715, 103105, 115235, 226831, 253517, 391799, 1134155, 1267585, 1958995, 4309789, 21548945]

約数ペア:

[(1, 21548945), (5, 4309789), (11, 1958995), (17, 1267585), (19, 1134155), (55, 391799), (85, 253517), (95, 226831), (187, 115235), (209, 103105), (323, 66715), (935, 23047), (1045, 20621), (1213, 17765), (1615, 13343), (3553, 6065)]