21780850

素因数分解:

$2^1\times 5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{4787}}^1$

素因数の和:4819

約数の個数: 48

約数和(自身を含む): 49871808

約数和(自身を除く): 28090958

約数列:

[1, 2, 5, 7, 10, 13, 14, 25, 26, 35, 50, 65, 70, 91, 130, 175, 182, 325, 350, 455, 650, 910, 2275, 4550, 4787, 9574, 23935, 33509, 47870, 62231, 67018, 119675, 124462, 167545, 239350, 311155, 335090, 435617, 622310, 837725, 871234, 1555775, 1675450, 2178085, 3111550, 4356170, 10890425, 21780850]

約数ペア:

[(1, 21780850), (2, 10890425), (5, 4356170), (7, 3111550), (10, 2178085), (13, 1675450), (14, 1555775), (25, 871234), (26, 837725), (35, 622310), (50, 435617), (65, 335090), (70, 311155), (91, 239350), (130, 167545), (175, 124462), (182, 119675), (325, 67018), (350, 62231), (455, 47870), (650, 33509), (910, 23935), (2275, 9574), (4550, 4787)]