21211216

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{101977}}^1$

素因数の和:101998

約数の個数: 20

約数和(自身を含む): 44258452

約数和(自身を除く): 23047236

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 101977, 203954, 407908, 815816, 1325701, 1631632, 2651402, 5302804, 10605608, 21211216]

約数ペア:

[(1, 21211216), (2, 10605608), (4, 5302804), (8, 2651402), (13, 1631632), (16, 1325701), (26, 815816), (52, 407908), (104, 203954), (208, 101977)]