78840020

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{80449}}^1$

素因数の和:80472

約数の個数: 36

約数和(自身を含む): 192597300

約数和(自身を除く): 113757280

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 80449, 160898, 321796, 402245, 563143, 804490, 1126286, 1608980, 2252572, 2815715, 3942001, 5631430, 7884002, 11262860, 15768004, 19710005, 39420010, 78840020]

約数ペア:

[(1, 78840020), (2, 39420010), (4, 19710005), (5, 15768004), (7, 11262860), (10, 7884002), (14, 5631430), (20, 3942001), (28, 2815715), (35, 2252572), (49, 1608980), (70, 1126286), (98, 804490), (140, 563143), (196, 402245), (245, 321796), (490, 160898), (980, 80449)]