31121181

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^2\times {\mathrm{37}}^1\times {\mathrm{79}}^1$

素因数の和:155

約数の個数: 72

約数和(自身を含む): 57857280

約数和(自身を除く): 26736099

約数列:

[1, 3, 7, 9, 13, 21, 37, 39, 63, 79, 91, 111, 117, 169, 237, 259, 273, 333, 481, 507, 553, 711, 777, 819, 1027, 1183, 1443, 1521, 1659, 2331, 2923, 3081, 3367, 3549, 4329, 4977, 6253, 7189, 8769, 9243, 10101, 10647, 13351, 18759, 20461, 21567, 26307, 30303, 37999, 40053, 43771, 56277, 61383, 64701, 93457, 113997, 120159, 131313, 184149, 265993, 280371, 341991, 393939, 493987, 797979, 841113, 1481961, 2393937, 3457909, 4445883, 10373727, 31121181]

約数ペア:

[(1, 31121181), (3, 10373727), (7, 4445883), (9, 3457909), (13, 2393937), (21, 1481961), (37, 841113), (39, 797979), (63, 493987), (79, 393939), (91, 341991), (111, 280371), (117, 265993), (169, 184149), (237, 131313), (259, 120159), (273, 113997), (333, 93457), (481, 64701), (507, 61383), (553, 56277), (711, 43771), (777, 40053), (819, 37999), (1027, 30303), (1183, 26307), (1443, 21567), (1521, 20461), (1659, 18759), (2331, 13351), (2923, 10647), (3081, 10101), (3367, 9243), (3549, 8769), (4329, 7189), (4977, 6253)]