20871189

素因数分解:

$3^4\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{659}}^1$

素因数の和:711

約数の個数: 40

約数和(自身を含む): 34499520

約数和(自身を除く): 13628331

約数列:

[1, 3, 9, 17, 23, 27, 51, 69, 81, 153, 207, 391, 459, 621, 659, 1173, 1377, 1863, 1977, 3519, 5931, 10557, 11203, 15157, 17793, 31671, 33609, 45471, 53379, 100827, 136413, 257669, 302481, 409239, 773007, 907443, 1227717, 2319021, 6957063, 20871189]

約数ペア:

[(1, 20871189), (3, 6957063), (9, 2319021), (17, 1227717), (23, 907443), (27, 773007), (51, 409239), (69, 302481), (81, 257669), (153, 136413), (207, 100827), (391, 53379), (459, 45471), (621, 33609), (659, 31671), (1173, 17793), (1377, 15157), (1863, 11203), (1977, 10557), (3519, 5931)]