21821440

素因数分解:

$2^{11}\times 5^1\times {\mathrm{2131}}^1$

素因数の和:2158

約数の個数: 48

約数和(自身を含む): 52383240

約数和(自身を除く): 30561800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1024, 1280, 2048, 2131, 2560, 4262, 5120, 8524, 10240, 10655, 17048, 21310, 34096, 42620, 68192, 85240, 136384, 170480, 272768, 340960, 545536, 681920, 1091072, 1363840, 2182144, 2727680, 4364288, 5455360, 10910720, 21821440]

約数ペア:

[(1, 21821440), (2, 10910720), (4, 5455360), (5, 4364288), (8, 2727680), (10, 2182144), (16, 1363840), (20, 1091072), (32, 681920), (40, 545536), (64, 340960), (80, 272768), (128, 170480), (160, 136384), (256, 85240), (320, 68192), (512, 42620), (640, 34096), (1024, 21310), (1280, 17048), (2048, 10655), (2131, 10240), (2560, 8524), (4262, 5120)]