20885816

素因数分解:

$2^3\times 7^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{227}}^1$

素因数の和:324

約数の個数: 64

約数和(自身を含む): 47278080

約数和(自身を除く): 26392264

約数列:

[1, 2, 4, 7, 8, 14, 28, 31, 53, 56, 62, 106, 124, 212, 217, 227, 248, 371, 424, 434, 454, 742, 868, 908, 1484, 1589, 1643, 1736, 1816, 2968, 3178, 3286, 6356, 6572, 7037, 11501, 12031, 12712, 13144, 14074, 23002, 24062, 28148, 46004, 48124, 49259, 56296, 84217, 92008, 96248, 98518, 168434, 197036, 336868, 372961, 394072, 673736, 745922, 1491844, 2610727, 2983688, 5221454, 10442908, 20885816]

約数ペア:

[(1, 20885816), (2, 10442908), (4, 5221454), (7, 2983688), (8, 2610727), (14, 1491844), (28, 745922), (31, 673736), (53, 394072), (56, 372961), (62, 336868), (106, 197036), (124, 168434), (212, 98518), (217, 96248), (227, 92008), (248, 84217), (371, 56296), (424, 49259), (434, 48124), (454, 46004), (742, 28148), (868, 24062), (908, 23002), (1484, 14074), (1589, 13144), (1643, 12712), (1736, 12031), (1816, 11501), (2968, 7037), (3178, 6572), (3286, 6356)]