21368765

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{83}}^1\times {\mathrm{151}}^1$

素因数の和:281

約数の個数: 32

約数和(自身を含む): 29417472

約数和(自身を除く): 8048707

約数列:

[1, 5, 11, 31, 55, 83, 151, 155, 341, 415, 755, 913, 1661, 1705, 2573, 4565, 4681, 8305, 12533, 12865, 23405, 28303, 51491, 62665, 137863, 141515, 257455, 388523, 689315, 1942615, 4273753, 21368765]

約数ペア:

[(1, 21368765), (5, 4273753), (11, 1942615), (31, 689315), (55, 388523), (83, 257455), (151, 141515), (155, 137863), (341, 62665), (415, 51491), (755, 28303), (913, 23405), (1661, 12865), (1705, 12533), (2573, 8305), (4565, 4681)]