20698580

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{21121}}^1$

素因数の和:21144

約数の個数: 36

約数和(自身を含む): 50566068

約数和(自身を除く): 29867488

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 21121, 42242, 84484, 105605, 147847, 211210, 295694, 422420, 591388, 739235, 1034929, 1478470, 2069858, 2956940, 4139716, 5174645, 10349290, 20698580]

約数ペア:

[(1, 20698580), (2, 10349290), (4, 5174645), (5, 4139716), (7, 2956940), (10, 2069858), (14, 1478470), (20, 1034929), (28, 739235), (35, 591388), (49, 422420), (70, 295694), (98, 211210), (140, 147847), (196, 105605), (245, 84484), (490, 42242), (980, 21121)]