678989890

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{67427}}^1$

素因数の和:67506

約数の個数: 32

約数和(自身を含む): 1310800320

約数和(自身を除く): 631810430

約数列:

[1, 2, 5, 10, 19, 38, 53, 95, 106, 190, 265, 530, 1007, 2014, 5035, 10070, 67427, 134854, 337135, 674270, 1281113, 2562226, 3573631, 6405565, 7147262, 12811130, 17868155, 35736310, 67898989, 135797978, 339494945, 678989890]

約数ペア:

[(1, 678989890), (2, 339494945), (5, 135797978), (10, 67898989), (19, 35736310), (38, 17868155), (53, 12811130), (95, 7147262), (106, 6405565), (190, 3573631), (265, 2562226), (530, 1281113), (1007, 674270), (2014, 337135), (5035, 134854), (10070, 67427)]