217412181

素因数分解:

$3^4\times 7^1\times {\mathrm{307}}^1\times {\mathrm{1249}}^1$

素因数の和:1575

約数の個数: 40

約数和(自身を含む): 372680000

約数和(自身を除く): 155267819

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 307, 567, 921, 1249, 2149, 2763, 3747, 6447, 8289, 8743, 11241, 19341, 24867, 26229, 33723, 58023, 78687, 101169, 174069, 236061, 383443, 708183, 1150329, 2684101, 3450987, 8052303, 10352961, 24156909, 31058883, 72470727, 217412181]

約数ペア:

[(1, 217412181), (3, 72470727), (7, 31058883), (9, 24156909), (21, 10352961), (27, 8052303), (63, 3450987), (81, 2684101), (189, 1150329), (307, 708183), (567, 383443), (921, 236061), (1249, 174069), (2149, 101169), (2763, 78687), (3747, 58023), (6447, 33723), (8289, 26229), (8743, 24867), (11241, 19341)]