21619701

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{23}}^2\times {\mathrm{239}}^1$

素因数の和:310

約数の個数: 36

約数和(自身を含む): 34507200

約数和(自身を除く): 12887499

約数列:

[1, 3, 9, 19, 23, 57, 69, 171, 207, 239, 437, 529, 717, 1311, 1587, 2151, 3933, 4541, 4761, 5497, 10051, 13623, 16491, 30153, 40869, 49473, 90459, 104443, 126431, 313329, 379293, 939987, 1137879, 2402189, 7206567, 21619701]

約数ペア:

[(1, 21619701), (3, 7206567), (9, 2402189), (19, 1137879), (23, 939987), (57, 379293), (69, 313329), (171, 126431), (207, 104443), (239, 90459), (437, 49473), (529, 40869), (717, 30153), (1311, 16491), (1587, 13623), (2151, 10051), (3933, 5497), (4541, 4761)]