21000815479

素因数分解:

$7^2\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{587}}^1\times {\mathrm{1481}}^1$

素因数の和:2128

約数の個数: 48

約数和(自身を含む): 26822184480

約数和(自身を除く): 5821369001

約数列:

[1, 7, 17, 29, 49, 119, 203, 493, 587, 833, 1421, 1481, 3451, 4109, 9979, 10367, 17023, 24157, 25177, 28763, 42949, 69853, 72569, 119161, 176239, 289391, 300643, 488971, 730133, 834127, 869347, 1233673, 2025737, 2104501, 5110931, 6085429, 14180159, 14778899, 25211063, 35776517, 42598003, 103452293, 176477441, 428588071, 724166051, 1235342087, 3000116497, 21000815479]

約数ペア:

[(1, 21000815479), (7, 3000116497), (17, 1235342087), (29, 724166051), (49, 428588071), (119, 176477441), (203, 103452293), (493, 42598003), (587, 35776517), (833, 25211063), (1421, 14778899), (1481, 14180159), (3451, 6085429), (4109, 5110931), (9979, 2104501), (10367, 2025737), (17023, 1233673), (24157, 869347), (25177, 834127), (28763, 730133), (42949, 488971), (69853, 300643), (72569, 289391), (119161, 176239)]