20685855

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{3527}}^1$

素因数の和:3575

約数の個数: 32

約数和(自身を含む): 36578304

約数和(自身を除く): 15892449

約数列:

[1, 3, 5, 15, 17, 23, 51, 69, 85, 115, 255, 345, 391, 1173, 1955, 3527, 5865, 10581, 17635, 52905, 59959, 81121, 179877, 243363, 299795, 405605, 899385, 1216815, 1379057, 4137171, 6895285, 20685855]

約数ペア:

[(1, 20685855), (3, 6895285), (5, 4137171), (15, 1379057), (17, 1216815), (23, 899385), (51, 405605), (69, 299795), (85, 243363), (115, 179877), (255, 81121), (345, 59959), (391, 52905), (1173, 17635), (1955, 10581), (3527, 5865)]