19801045

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{23}}^1\times {\mathrm{1423}}^1$

素因数の和:1473

約数の個数: 24

約数和(自身を含む): 27272448

約数和(自身を除く): 7471403

約数列:

[1, 5, 11, 23, 55, 115, 121, 253, 605, 1265, 1423, 2783, 7115, 13915, 15653, 32729, 78265, 163645, 172183, 360019, 860915, 1800095, 3960209, 19801045]

約数ペア:

[(1, 19801045), (5, 3960209), (11, 1800095), (23, 860915), (55, 360019), (115, 172183), (121, 163645), (253, 78265), (605, 32729), (1265, 15653), (1423, 13915), (2783, 7115)]