21012474860

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{80817211}}^1$

素因数の和:80817233

約数の個数: 24

約数和(自身を含む): 47520520656

約数和(自身を除く): 26508045796

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 80817211, 161634422, 323268844, 404086055, 808172110, 1050623743, 1616344220, 2101247486, 4202494972, 5253118715, 10506237430, 21012474860]

約数ペア:

[(1, 21012474860), (2, 10506237430), (4, 5253118715), (5, 4202494972), (10, 2101247486), (13, 1616344220), (20, 1050623743), (26, 808172110), (52, 404086055), (65, 323268844), (130, 161634422), (260, 80817211)]