20958544

素因数分解:

$2^4\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{743}}^1$

素因数の和:835

約数の個数: 40

約数和(自身を含む): 42622272

約数和(自身を除く): 21663728

約数列:

[1, 2, 4, 8, 16, 41, 43, 82, 86, 164, 172, 328, 344, 656, 688, 743, 1486, 1763, 2972, 3526, 5944, 7052, 11888, 14104, 28208, 30463, 31949, 60926, 63898, 121852, 127796, 243704, 255592, 487408, 511184, 1309909, 2619818, 5239636, 10479272, 20958544]

約数ペア:

[(1, 20958544), (2, 10479272), (4, 5239636), (8, 2619818), (16, 1309909), (41, 511184), (43, 487408), (82, 255592), (86, 243704), (164, 127796), (172, 121852), (328, 63898), (344, 60926), (656, 31949), (688, 30463), (743, 28208), (1486, 14104), (1763, 11888), (2972, 7052), (3526, 5944)]