21256020

素因数分解:

$2^2\times 3^4\times 5^1\times {\mathrm{13121}}^1$

素因数の和:13142

約数の個数: 60

約数和(自身を含む): 66686004

約数和(自身を除く): 45429984

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 81, 90, 108, 135, 162, 180, 270, 324, 405, 540, 810, 1620, 13121, 26242, 39363, 52484, 65605, 78726, 118089, 131210, 157452, 196815, 236178, 262420, 354267, 393630, 472356, 590445, 708534, 787260, 1062801, 1180890, 1417068, 1771335, 2125602, 2361780, 3542670, 4251204, 5314005, 7085340, 10628010, 21256020]

約数ペア:

[(1, 21256020), (2, 10628010), (3, 7085340), (4, 5314005), (5, 4251204), (6, 3542670), (9, 2361780), (10, 2125602), (12, 1771335), (15, 1417068), (18, 1180890), (20, 1062801), (27, 787260), (30, 708534), (36, 590445), (45, 472356), (54, 393630), (60, 354267), (81, 262420), (90, 236178), (108, 196815), (135, 157452), (162, 131210), (180, 118089), (270, 78726), (324, 65605), (405, 52484), (540, 39363), (810, 26242), (1620, 13121)]