1278640

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{1453}}^1$

素因数の和:1477

約数の個数: 40

約数和(自身を含む): 3245328

約数和(自身を除く): 1966688

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 1453, 2906, 5812, 7265, 11624, 14530, 15983, 23248, 29060, 31966, 58120, 63932, 79915, 116240, 127864, 159830, 255728, 319660, 639320, 1278640]

約数ペア:

[(1, 1278640), (2, 639320), (4, 319660), (5, 255728), (8, 159830), (10, 127864), (11, 116240), (16, 79915), (20, 63932), (22, 58120), (40, 31966), (44, 29060), (55, 23248), (80, 15983), (88, 14530), (110, 11624), (176, 7265), (220, 5812), (440, 2906), (880, 1453)]