21421575

素因数分解:

$3^2\times 5^2\times 7^2\times {\mathrm{29}}^1\times {\mathrm{67}}^1$

素因数の和:126

約数の個数: 108

約数和(自身を含む): 46860840

約数和(自身を除く): 25439265

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 29, 35, 45, 49, 63, 67, 75, 87, 105, 145, 147, 175, 201, 203, 225, 245, 261, 315, 335, 435, 441, 469, 525, 603, 609, 725, 735, 1005, 1015, 1225, 1305, 1407, 1421, 1575, 1675, 1827, 1943, 2175, 2205, 2345, 3015, 3045, 3283, 3675, 4221, 4263, 5025, 5075, 5829, 6525, 7035, 7105, 9135, 9715, 9849, 11025, 11725, 12789, 13601, 15075, 15225, 16415, 17487, 21105, 21315, 29145, 29547, 35175, 35525, 40803, 45675, 48575, 49245, 63945, 68005, 82075, 87435, 95207, 105525, 106575, 122409, 145725, 147735, 204015, 246225, 285621, 319725, 340025, 437175, 476035, 612045, 738675, 856863, 1020075, 1428105, 2380175, 3060225, 4284315, 7140525, 21421575]

約数ペア:

[(1, 21421575), (3, 7140525), (5, 4284315), (7, 3060225), (9, 2380175), (15, 1428105), (21, 1020075), (25, 856863), (29, 738675), (35, 612045), (45, 476035), (49, 437175), (63, 340025), (67, 319725), (75, 285621), (87, 246225), (105, 204015), (145, 147735), (147, 145725), (175, 122409), (201, 106575), (203, 105525), (225, 95207), (245, 87435), (261, 82075), (315, 68005), (335, 63945), (435, 49245), (441, 48575), (469, 45675), (525, 40803), (603, 35525), (609, 35175), (725, 29547), (735, 29145), (1005, 21315), (1015, 21105), (1225, 17487), (1305, 16415), (1407, 15225), (1421, 15075), (1575, 13601), (1675, 12789), (1827, 11725), (1943, 11025), (2175, 9849), (2205, 9715), (2345, 9135), (3015, 7105), (3045, 7035), (3283, 6525), (3675, 5829), (4221, 5075), (4263, 5025)]