21068775

素因数分解:

$3^3\times 5^2\times 7^4\times {\mathrm{13}}^1$

素因数の和:60

約数の個数: 120

約数和(自身を含む): 48625360

約数和(自身を除く): 27556585

約数列:

[1, 3, 5, 7, 9, 13, 15, 21, 25, 27, 35, 39, 45, 49, 63, 65, 75, 91, 105, 117, 135, 147, 175, 189, 195, 225, 245, 273, 315, 325, 343, 351, 441, 455, 525, 585, 637, 675, 735, 819, 945, 975, 1029, 1225, 1323, 1365, 1575, 1715, 1755, 1911, 2205, 2275, 2401, 2457, 2925, 3087, 3185, 3675, 4095, 4459, 4725, 5145, 5733, 6615, 6825, 7203, 8575, 8775, 9261, 9555, 11025, 12005, 12285, 13377, 15435, 15925, 17199, 20475, 21609, 22295, 25725, 28665, 31213, 33075, 36015, 40131, 46305, 47775, 60025, 61425, 64827, 66885, 77175, 85995, 93639, 108045, 111475, 120393, 143325, 156065, 180075, 200655, 231525, 280917, 324135, 334425, 429975, 468195, 540225, 601965, 780325, 842751, 1003275, 1404585, 1620675, 2340975, 3009825, 4213755, 7022925, 21068775]

約数ペア:

[(1, 21068775), (3, 7022925), (5, 4213755), (7, 3009825), (9, 2340975), (13, 1620675), (15, 1404585), (21, 1003275), (25, 842751), (27, 780325), (35, 601965), (39, 540225), (45, 468195), (49, 429975), (63, 334425), (65, 324135), (75, 280917), (91, 231525), (105, 200655), (117, 180075), (135, 156065), (147, 143325), (175, 120393), (189, 111475), (195, 108045), (225, 93639), (245, 85995), (273, 77175), (315, 66885), (325, 64827), (343, 61425), (351, 60025), (441, 47775), (455, 46305), (525, 40131), (585, 36015), (637, 33075), (675, 31213), (735, 28665), (819, 25725), (945, 22295), (975, 21609), (1029, 20475), (1225, 17199), (1323, 15925), (1365, 15435), (1575, 13377), (1715, 12285), (1755, 12005), (1911, 11025), (2205, 9555), (2275, 9261), (2401, 8775), (2457, 8575), (2925, 7203), (3087, 6825), (3185, 6615), (3675, 5733), (4095, 5145), (4459, 4725)]