20887515

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{42197}}^1$

素因数の和:42219

約数の個数: 24

約数和(自身を含む): 39497328

約数和(自身を除く): 18609813

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 55, 99, 165, 495, 42197, 126591, 210985, 379773, 464167, 632955, 1392501, 1898865, 2320835, 4177503, 6962505, 20887515]

約数ペア:

[(1, 20887515), (3, 6962505), (5, 4177503), (9, 2320835), (11, 1898865), (15, 1392501), (33, 632955), (45, 464167), (55, 379773), (99, 210985), (165, 126591), (495, 42197)]