20904585

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{79}}^1$

素因数の和:182

約数の個数: 64

約数和(自身を含む): 38707200

約数和(自身を除く): 17802615

約数列:

[1, 3, 5, 13, 15, 23, 39, 59, 65, 69, 79, 115, 177, 195, 237, 295, 299, 345, 395, 767, 885, 897, 1027, 1185, 1357, 1495, 1817, 2301, 3081, 3835, 4071, 4485, 4661, 5135, 5451, 6785, 9085, 11505, 13983, 15405, 17641, 20355, 23305, 23621, 27255, 52923, 60593, 69915, 70863, 88205, 107203, 118105, 181779, 264615, 302965, 321609, 354315, 536015, 908895, 1393639, 1608045, 4180917, 6968195, 20904585]

約数ペア:

[(1, 20904585), (3, 6968195), (5, 4180917), (13, 1608045), (15, 1393639), (23, 908895), (39, 536015), (59, 354315), (65, 321609), (69, 302965), (79, 264615), (115, 181779), (177, 118105), (195, 107203), (237, 88205), (295, 70863), (299, 69915), (345, 60593), (395, 52923), (767, 27255), (885, 23621), (897, 23305), (1027, 20355), (1185, 17641), (1357, 15405), (1495, 13983), (1817, 11505), (2301, 9085), (3081, 6785), (3835, 5451), (4071, 5135), (4485, 4661)]