20910213

素因数分解:

$3^2\times {\mathrm{31}}^1\times {\mathrm{149}}^1\times {\mathrm{503}}^1$

素因数の和:689

約数の個数: 24

約数和(自身を含む): 31449600

約数和(自身を除く): 10539387

約数列:

[1, 3, 9, 31, 93, 149, 279, 447, 503, 1341, 1509, 4527, 4619, 13857, 15593, 41571, 46779, 74947, 140337, 224841, 674523, 2323357, 6970071, 20910213]

約数ペア:

[(1, 20910213), (3, 6970071), (9, 2323357), (31, 674523), (93, 224841), (149, 140337), (279, 74947), (447, 46779), (503, 41571), (1341, 15593), (1509, 13857), (4527, 4619)]