21329715

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{257}}^1\times {\mathrm{503}}^1$

素因数の和:779

約数の個数: 32

約数和(自身を含む): 37449216

約数和(自身を除く): 16119501

約数列:

[1, 3, 5, 11, 15, 33, 55, 165, 257, 503, 771, 1285, 1509, 2515, 2827, 3855, 5533, 7545, 8481, 14135, 16599, 27665, 42405, 82995, 129271, 387813, 646355, 1421981, 1939065, 4265943, 7109905, 21329715]

約数ペア:

[(1, 21329715), (3, 7109905), (5, 4265943), (11, 1939065), (15, 1421981), (33, 646355), (55, 387813), (165, 129271), (257, 82995), (503, 42405), (771, 27665), (1285, 16599), (1509, 14135), (2515, 8481), (2827, 7545), (3855, 5533)]