21259291990

素因数分解:

$2^1\times 5^1\times {\mathrm{2909}}^1\times {\mathrm{730811}}^1$

素因数の和:733727

約数の個数: 16

約数和(自身を含む): 38279932560

約数和(自身を除く): 17020640570

約数列:

[1, 2, 5, 10, 2909, 5818, 14545, 29090, 730811, 1461622, 3654055, 7308110, 2125929199, 4251858398, 10629645995, 21259291990]

約数ペア:

[(1, 21259291990), (2, 10629645995), (5, 4251858398), (10, 2125929199), (2909, 7308110), (5818, 3654055), (14545, 1461622), (29090, 730811)]