21471255

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{127}}^1$

素因数の和:185

約数の個数: 72

約数和(自身を含む): 42911232

約数和(自身を除く): 21439977

約数列:

[1, 3, 5, 9, 13, 15, 17, 39, 45, 51, 65, 85, 117, 127, 153, 195, 221, 255, 289, 381, 585, 635, 663, 765, 867, 1105, 1143, 1445, 1651, 1905, 1989, 2159, 2601, 3315, 3757, 4335, 4953, 5715, 6477, 8255, 9945, 10795, 11271, 13005, 14859, 18785, 19431, 24765, 28067, 32385, 33813, 36703, 56355, 74295, 84201, 97155, 110109, 140335, 169065, 183515, 252603, 330327, 421005, 477139, 550545, 1263015, 1431417, 1651635, 2385695, 4294251, 7157085, 21471255]

約数ペア:

[(1, 21471255), (3, 7157085), (5, 4294251), (9, 2385695), (13, 1651635), (15, 1431417), (17, 1263015), (39, 550545), (45, 477139), (51, 421005), (65, 330327), (85, 252603), (117, 183515), (127, 169065), (153, 140335), (195, 110109), (221, 97155), (255, 84201), (289, 74295), (381, 56355), (585, 36703), (635, 33813), (663, 32385), (765, 28067), (867, 24765), (1105, 19431), (1143, 18785), (1445, 14859), (1651, 13005), (1905, 11271), (1989, 10795), (2159, 9945), (2601, 8255), (3315, 6477), (3757, 5715), (4335, 4953)]