21229808

素因数分解:

$2^4\times {\mathrm{97}}^1\times {\mathrm{13679}}^1$

素因数の和:13784

約数の個数: 20

約数和(自身を含む): 41559840

約数和(自身を除く): 20330032

約数列:

[1, 2, 4, 8, 16, 97, 194, 388, 776, 1552, 13679, 27358, 54716, 109432, 218864, 1326863, 2653726, 5307452, 10614904, 21229808]

約数ペア:

[(1, 21229808), (2, 10614904), (4, 5307452), (8, 2653726), (16, 1326863), (97, 218864), (194, 109432), (388, 54716), (776, 27358), (1552, 13679)]