21002345

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{1489}}^1$

素因数の和:1545

約数の個数: 32

約数和(自身を含む): 32040960

約数和(自身を除く): 11038615

約数列:

[1, 5, 7, 13, 31, 35, 65, 91, 155, 217, 403, 455, 1085, 1489, 2015, 2821, 7445, 10423, 14105, 19357, 46159, 52115, 96785, 135499, 230795, 323113, 600067, 677495, 1615565, 3000335, 4200469, 21002345]

約数ペア:

[(1, 21002345), (5, 4200469), (7, 3000335), (13, 1615565), (31, 677495), (35, 600067), (65, 323113), (91, 230795), (155, 135499), (217, 96785), (403, 52115), (455, 46159), (1085, 19357), (1489, 14105), (2015, 10423), (2821, 7445)]