20972690

素因数分解:

$2^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{109}}^1\times {\mathrm{271}}^1$

素因数の和:458

約数の個数: 32

約数和(自身を含む): 38776320

約数和(自身を除く): 17803630

約数列:

[1, 2, 5, 10, 71, 109, 142, 218, 271, 355, 542, 545, 710, 1090, 1355, 2710, 7739, 15478, 19241, 29539, 38482, 38695, 59078, 77390, 96205, 147695, 192410, 295390, 2097269, 4194538, 10486345, 20972690]

約数ペア:

[(1, 20972690), (2, 10486345), (5, 4194538), (10, 2097269), (71, 295390), (109, 192410), (142, 147695), (218, 96205), (271, 77390), (355, 59078), (542, 38695), (545, 38482), (710, 29539), (1090, 19241), (1355, 15478), (2710, 7739)]