21861705

素因数分解:

$3^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{107}}^1\times {\mathrm{257}}^1$

素因数の和:425

約数の個数: 32

約数和(自身を含む): 36111744

約数和(自身を除く): 14250039

約数列:

[1, 3, 5, 15, 53, 107, 159, 257, 265, 321, 535, 771, 795, 1285, 1605, 3855, 5671, 13621, 17013, 27499, 28355, 40863, 68105, 82497, 85065, 137495, 204315, 412485, 1457447, 4372341, 7287235, 21861705]

約数ペア:

[(1, 21861705), (3, 7287235), (5, 4372341), (15, 1457447), (53, 412485), (107, 204315), (159, 137495), (257, 85065), (265, 82497), (321, 68105), (535, 40863), (771, 28355), (795, 27499), (1285, 17013), (1605, 13621), (3855, 5671)]