21309440

素因数分解:

$2^{11}\times 5^1\times {\mathrm{2081}}^1$

素因数の和:2108

約数の個数: 48

約数和(自身を含む): 51154740

約数和(自身を除く): 29845300

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1024, 1280, 2048, 2081, 2560, 4162, 5120, 8324, 10240, 10405, 16648, 20810, 33296, 41620, 66592, 83240, 133184, 166480, 266368, 332960, 532736, 665920, 1065472, 1331840, 2130944, 2663680, 4261888, 5327360, 10654720, 21309440]

約数ペア:

[(1, 21309440), (2, 10654720), (4, 5327360), (5, 4261888), (8, 2663680), (10, 2130944), (16, 1331840), (20, 1065472), (32, 665920), (40, 532736), (64, 332960), (80, 266368), (128, 166480), (160, 133184), (256, 83240), (320, 66592), (512, 41620), (640, 33296), (1024, 20810), (1280, 16648), (2048, 10405), (2081, 10240), (2560, 8324), (4162, 5120)]