21397040

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{2011}}^1$

素因数の和:2050

約数の個数: 80

約数和(自身を含む): 59877120

約数和(自身を除く): 38480080

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 19, 20, 28, 35, 38, 40, 56, 70, 76, 80, 95, 112, 133, 140, 152, 190, 266, 280, 304, 380, 532, 560, 665, 760, 1064, 1330, 1520, 2011, 2128, 2660, 4022, 5320, 8044, 10055, 10640, 14077, 16088, 20110, 28154, 32176, 38209, 40220, 56308, 70385, 76418, 80440, 112616, 140770, 152836, 160880, 191045, 225232, 267463, 281540, 305672, 382090, 534926, 563080, 611344, 764180, 1069852, 1126160, 1337315, 1528360, 2139704, 2674630, 3056720, 4279408, 5349260, 10698520, 21397040]

約数ペア:

[(1, 21397040), (2, 10698520), (4, 5349260), (5, 4279408), (7, 3056720), (8, 2674630), (10, 2139704), (14, 1528360), (16, 1337315), (19, 1126160), (20, 1069852), (28, 764180), (35, 611344), (38, 563080), (40, 534926), (56, 382090), (70, 305672), (76, 281540), (80, 267463), (95, 225232), (112, 191045), (133, 160880), (140, 152836), (152, 140770), (190, 112616), (266, 80440), (280, 76418), (304, 70385), (380, 56308), (532, 40220), (560, 38209), (665, 32176), (760, 28154), (1064, 20110), (1330, 16088), (1520, 14077), (2011, 10640), (2128, 10055), (2660, 8044), (4022, 5320)]