840412

素因数分解:

$2^2\times {\mathrm{17}}^2\times {\mathrm{727}}^1$

素因数の和:765

約数の個数: 18

約数和(自身を含む): 1564472

約数和(自身を除く): 724060

約数列:

[1, 2, 4, 17, 34, 68, 289, 578, 727, 1156, 1454, 2908, 12359, 24718, 49436, 210103, 420206, 840412]

約数ペア:

[(1, 840412), (2, 420206), (4, 210103), (17, 49436), (34, 24718), (68, 12359), (289, 2908), (578, 1454), (727, 1156)]