21017025

素因数分解:

$3^2\times 5^2\times {\mathrm{29}}^1\times {\mathrm{3221}}^1$

素因数の和:3266

約数の個数: 36

約数和(自身を含む): 38953980

約数和(自身を除く): 17936955

約数列:

[1, 3, 5, 9, 15, 25, 29, 45, 75, 87, 145, 225, 261, 435, 725, 1305, 2175, 3221, 6525, 9663, 16105, 28989, 48315, 80525, 93409, 144945, 241575, 280227, 467045, 724725, 840681, 1401135, 2335225, 4203405, 7005675, 21017025]

約数ペア:

[(1, 21017025), (3, 7005675), (5, 4203405), (9, 2335225), (15, 1401135), (25, 840681), (29, 724725), (45, 467045), (75, 280227), (87, 241575), (145, 144945), (225, 93409), (261, 80525), (435, 48315), (725, 28989), (1305, 16105), (2175, 9663), (3221, 6525)]