78870988

素因数分解:

$2^2\times 7^2\times {\mathrm{402403}}^1$

素因数の和:402421

約数の個数: 18

約数和(自身を含む): 160559196

約数和(自身を除く): 81688208

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 196, 402403, 804806, 1609612, 2816821, 5633642, 11267284, 19717747, 39435494, 78870988]

約数ペア:

[(1, 78870988), (2, 39435494), (4, 19717747), (7, 11267284), (14, 5633642), (28, 2816821), (49, 1609612), (98, 804806), (196, 402403)]