21286629

素因数分解:

$3^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{79}}^1$

素因数の和:159

約数の個数: 72

約数和(自身を含む): 39836160

約数和(自身を除く): 18549531

約数列:

[1, 3, 7, 9, 13, 21, 39, 47, 49, 63, 79, 91, 117, 141, 147, 237, 273, 329, 423, 441, 553, 611, 637, 711, 819, 987, 1027, 1659, 1833, 1911, 2303, 2961, 3081, 3713, 3871, 4277, 4977, 5499, 5733, 6909, 7189, 9243, 11139, 11613, 12831, 20727, 21567, 25991, 29939, 33417, 34839, 38493, 48269, 50323, 64701, 77973, 89817, 144807, 150969, 181937, 233919, 269451, 337883, 434421, 452907, 545811, 1013649, 1637433, 2365181, 3040947, 7095543, 21286629]

約数ペア:

[(1, 21286629), (3, 7095543), (7, 3040947), (9, 2365181), (13, 1637433), (21, 1013649), (39, 545811), (47, 452907), (49, 434421), (63, 337883), (79, 269451), (91, 233919), (117, 181937), (141, 150969), (147, 144807), (237, 89817), (273, 77973), (329, 64701), (423, 50323), (441, 48269), (553, 38493), (611, 34839), (637, 33417), (711, 29939), (819, 25991), (987, 21567), (1027, 20727), (1659, 12831), (1833, 11613), (1911, 11139), (2303, 9243), (2961, 7189), (3081, 6909), (3713, 5733), (3871, 5499), (4277, 4977)]