20521805

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{97}}^1\times {\mathrm{131}}^1$

素因数の和:269

約数の個数: 32

約数和(自身を含む): 27941760

約数和(自身を除く): 7419955

約数列:

[1, 5, 17, 19, 85, 95, 97, 131, 323, 485, 655, 1615, 1649, 1843, 2227, 2489, 8245, 9215, 11135, 12445, 12707, 31331, 42313, 63535, 156655, 211565, 216019, 241433, 1080095, 1207165, 4104361, 20521805]

約数ペア:

[(1, 20521805), (5, 4104361), (17, 1207165), (19, 1080095), (85, 241433), (95, 216019), (97, 211565), (131, 156655), (323, 63535), (485, 42313), (655, 31331), (1615, 12707), (1649, 12445), (1843, 11135), (2227, 9215), (2489, 8245)]