20512191

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{101}}^1\times {\mathrm{509}}^1$

素因数の和:639

約数の個数: 32

約数和(自身を含む): 33292800

約数和(自身を除く): 12780609

約数列:

[1, 3, 7, 19, 21, 57, 101, 133, 303, 399, 509, 707, 1527, 1919, 2121, 3563, 5757, 9671, 10689, 13433, 29013, 40299, 51409, 67697, 154227, 203091, 359863, 976771, 1079589, 2930313, 6837397, 20512191]

約数ペア:

[(1, 20512191), (3, 6837397), (7, 2930313), (19, 1079589), (21, 976771), (57, 359863), (101, 203091), (133, 154227), (303, 67697), (399, 51409), (509, 40299), (707, 29013), (1527, 13433), (1919, 10689), (2121, 9671), (3563, 5757)]