27720855

素因数分解:

$3^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{59}}^1\times {\mathrm{197}}^1$

素因数の和:320

約数の個数: 48

約数和(自身を含む): 50038560

約数和(自身を除く): 22317705

約数列:

[1, 3, 5, 9, 15, 45, 53, 59, 159, 177, 197, 265, 295, 477, 531, 591, 795, 885, 985, 1773, 2385, 2655, 2955, 3127, 8865, 9381, 10441, 11623, 15635, 28143, 31323, 34869, 46905, 52205, 58115, 93969, 104607, 140715, 156615, 174345, 469845, 523035, 616019, 1848057, 3080095, 5544171, 9240285, 27720855]

約数ペア:

[(1, 27720855), (3, 9240285), (5, 5544171), (9, 3080095), (15, 1848057), (45, 616019), (53, 523035), (59, 469845), (159, 174345), (177, 156615), (197, 140715), (265, 104607), (295, 93969), (477, 58115), (531, 52205), (591, 46905), (795, 34869), (885, 31323), (985, 28143), (1773, 15635), (2385, 11623), (2655, 10441), (2955, 9381), (3127, 8865)]