31490781

素因数分解:

$3^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{83}}^1\times {\mathrm{89}}^1$

素因数の和:218

約数の個数: 48

約数和(自身を含む): 51710400

約数和(自身を除く): 20219619

約数列:

[1, 3, 7, 21, 29, 49, 83, 87, 89, 147, 203, 249, 267, 581, 609, 623, 1421, 1743, 1869, 2407, 2581, 4067, 4263, 4361, 7221, 7387, 7743, 12201, 13083, 16849, 18067, 22161, 50547, 51709, 54201, 117943, 126469, 155127, 214223, 353829, 361963, 379407, 642669, 1085889, 1499561, 4498683, 10496927, 31490781]

約数ペア:

[(1, 31490781), (3, 10496927), (7, 4498683), (21, 1499561), (29, 1085889), (49, 642669), (83, 379407), (87, 361963), (89, 353829), (147, 214223), (203, 155127), (249, 126469), (267, 117943), (581, 54201), (609, 51709), (623, 50547), (1421, 22161), (1743, 18067), (1869, 16849), (2407, 13083), (2581, 12201), (4067, 7743), (4263, 7387), (4361, 7221)]