20912715

素因数分解:

$3^3\times 5^1\times {\mathrm{97}}^1\times {\mathrm{1597}}^1$

素因数の和:1708

約数の個数: 32

約数和(自身を含む): 37584960

約数和(自身を除く): 16672245

約数列:

[1, 3, 5, 9, 15, 27, 45, 97, 135, 291, 485, 873, 1455, 1597, 2619, 4365, 4791, 7985, 13095, 14373, 23955, 43119, 71865, 154909, 215595, 464727, 774545, 1394181, 2323635, 4182543, 6970905, 20912715]

約数ペア:

[(1, 20912715), (3, 6970905), (5, 4182543), (9, 2323635), (15, 1394181), (27, 774545), (45, 464727), (97, 215595), (135, 154909), (291, 71865), (485, 43119), (873, 23955), (1455, 14373), (1597, 13095), (2619, 7985), (4365, 4791)]