20976975

素因数分解:

$3^6\times 5^2\times {\mathrm{1151}}^1$

素因数の和:1179

約数の個数: 42

約数和(自身を含む): 39033216

約数和(自身を除く): 18056241

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 81, 135, 225, 243, 405, 675, 729, 1151, 1215, 2025, 3453, 3645, 5755, 6075, 10359, 17265, 18225, 28775, 31077, 51795, 86325, 93231, 155385, 258975, 279693, 466155, 776925, 839079, 1398465, 2330775, 4195395, 6992325, 20976975]

約数ペア:

[(1, 20976975), (3, 6992325), (5, 4195395), (9, 2330775), (15, 1398465), (25, 839079), (27, 776925), (45, 466155), (75, 279693), (81, 258975), (135, 155385), (225, 93231), (243, 86325), (405, 51795), (675, 31077), (729, 28775), (1151, 18225), (1215, 17265), (2025, 10359), (3453, 6075), (3645, 5755)]