20864415

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{137}}^1$

素因数の和:240

約数の個数: 64

約数和(自身を含む): 40061952

約数和(自身を除く): 19197537

約数列:

[1, 3, 5, 11, 13, 15, 33, 39, 55, 65, 71, 137, 143, 165, 195, 213, 355, 411, 429, 685, 715, 781, 923, 1065, 1507, 1781, 2055, 2145, 2343, 2769, 3905, 4521, 4615, 5343, 7535, 8905, 9727, 10153, 11715, 13845, 19591, 22605, 26715, 29181, 30459, 48635, 50765, 58773, 97955, 106997, 126451, 145905, 152295, 293865, 320991, 379353, 534985, 632255, 1390961, 1604955, 1896765, 4172883, 6954805, 20864415]

約数ペア:

[(1, 20864415), (3, 6954805), (5, 4172883), (11, 1896765), (13, 1604955), (15, 1390961), (33, 632255), (39, 534985), (55, 379353), (65, 320991), (71, 293865), (137, 152295), (143, 145905), (165, 126451), (195, 106997), (213, 97955), (355, 58773), (411, 50765), (429, 48635), (685, 30459), (715, 29181), (781, 26715), (923, 22605), (1065, 19591), (1507, 13845), (1781, 11715), (2055, 10153), (2145, 9727), (2343, 8905), (2769, 7535), (3905, 5343), (4521, 4615)]