21100220

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{9679}}^1$

素因数の和:9797

約数の個数: 24

約数和(自身を含む): 44721600

約数和(自身を除く): 23621380

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 9679, 19358, 38716, 48395, 96790, 193580, 1055011, 2110022, 4220044, 5275055, 10550110, 21100220]

約数ペア:

[(1, 21100220), (2, 10550110), (4, 5275055), (5, 4220044), (10, 2110022), (20, 1055011), (109, 193580), (218, 96790), (436, 48395), (545, 38716), (1090, 19358), (2180, 9679)]