20012985

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{263}}^1$

素因数の和:382

約数の個数: 48

約数和(自身を含む): 37065600

約数和(自身を除く): 17052615

約数列:

[1, 3, 5, 9, 15, 19, 45, 57, 89, 95, 171, 263, 267, 285, 445, 789, 801, 855, 1315, 1335, 1691, 2367, 3945, 4005, 4997, 5073, 8455, 11835, 14991, 15219, 23407, 24985, 25365, 44973, 70221, 74955, 76095, 117035, 210663, 224865, 351105, 444733, 1053315, 1334199, 2223665, 4002597, 6670995, 20012985]

約数ペア:

[(1, 20012985), (3, 6670995), (5, 4002597), (9, 2223665), (15, 1334199), (19, 1053315), (45, 444733), (57, 351105), (89, 224865), (95, 210663), (171, 117035), (263, 76095), (267, 74955), (285, 70221), (445, 44973), (789, 25365), (801, 24985), (855, 23407), (1315, 15219), (1335, 14991), (1691, 11835), (2367, 8455), (3945, 5073), (4005, 4997)]