21440025

素因数分解:

$3^3\times 5^2\times {\mathrm{23}}^1\times {\mathrm{1381}}^1$

素因数の和:1423

約数の個数: 48

約数和(自身を含む): 41128320

約数和(自身を除く): 19688295

約数列:

[1, 3, 5, 9, 15, 23, 25, 27, 45, 69, 75, 115, 135, 207, 225, 345, 575, 621, 675, 1035, 1381, 1725, 3105, 4143, 5175, 6905, 12429, 15525, 20715, 31763, 34525, 37287, 62145, 95289, 103575, 158815, 186435, 285867, 310725, 476445, 794075, 857601, 932175, 1429335, 2382225, 4288005, 7146675, 21440025]

約数ペア:

[(1, 21440025), (3, 7146675), (5, 4288005), (9, 2382225), (15, 1429335), (23, 932175), (25, 857601), (27, 794075), (45, 476445), (69, 310725), (75, 285867), (115, 186435), (135, 158815), (207, 103575), (225, 95289), (345, 62145), (575, 37287), (621, 34525), (675, 31763), (1035, 20715), (1381, 15525), (1725, 12429), (3105, 6905), (4143, 5175)]