12921220

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{49697}}^1$

素因数の和:49719

約数の個数: 24

約数和(自身を含む): 29222424

約数和(自身を除く): 16301204

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 49697, 99394, 198788, 248485, 496970, 646061, 993940, 1292122, 2584244, 3230305, 6460610, 12921220]

約数ペア:

[(1, 12921220), (2, 6460610), (4, 3230305), (5, 2584244), (10, 1292122), (13, 993940), (20, 646061), (26, 496970), (52, 248485), (65, 198788), (130, 99394), (260, 49697)]