19918688

素因数分解:

$2^5\times {\mathrm{19}}^1\times {\mathrm{181}}^2$

素因数の和:391

約数の個数: 36

約数和(自身を含む): 41508180

約数和(自身を除く): 21589492

約数列:

[1, 2, 4, 8, 16, 19, 32, 38, 76, 152, 181, 304, 362, 608, 724, 1448, 2896, 3439, 5792, 6878, 13756, 27512, 32761, 55024, 65522, 110048, 131044, 262088, 524176, 622459, 1048352, 1244918, 2489836, 4979672, 9959344, 19918688]

約数ペア:

[(1, 19918688), (2, 9959344), (4, 4979672), (8, 2489836), (16, 1244918), (19, 1048352), (32, 622459), (38, 524176), (76, 262088), (152, 131044), (181, 110048), (304, 65522), (362, 55024), (608, 32761), (724, 27512), (1448, 13756), (2896, 6878), (3439, 5792)]