256880020

素因数分解:

$2^2\times 5^1\times {\mathrm{83}}^1\times {\mathrm{154747}}^1$

素因数の和:154839

約数の個数: 24

約数和(自身を含む): 545950944

約数和(自身を除く): 289070924

約数列:

[1, 2, 4, 5, 10, 20, 83, 166, 332, 415, 830, 1660, 154747, 309494, 618988, 773735, 1547470, 3094940, 12844001, 25688002, 51376004, 64220005, 128440010, 256880020]

約数ペア:

[(1, 256880020), (2, 128440010), (4, 64220005), (5, 51376004), (10, 25688002), (20, 12844001), (83, 3094940), (166, 1547470), (332, 773735), (415, 618988), (830, 309494), (1660, 154747)]