20634921

素因数分解:

$3^2\times {\mathrm{29}}^1\times {\mathrm{173}}^1\times {\mathrm{457}}^1$

素因数の和:665

約数の個数: 24

約数和(自身を含む): 31079880

約数和(自身を除く): 10444959

約数列:

[1, 3, 9, 29, 87, 173, 261, 457, 519, 1371, 1557, 4113, 5017, 13253, 15051, 39759, 45153, 79061, 119277, 237183, 711549, 2292769, 6878307, 20634921]

約数ペア:

[(1, 20634921), (3, 6878307), (9, 2292769), (29, 711549), (87, 237183), (173, 119277), (261, 79061), (457, 45153), (519, 39759), (1371, 15051), (1557, 13253), (4113, 5017)]