21502705

素因数分解:

$5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{509}}^1$

素因数の和:609

約数の個数: 32

約数和(自身を含む): 31726080

約数和(自身を除く): 10223375

約数列:

[1, 5, 7, 17, 35, 71, 85, 119, 355, 497, 509, 595, 1207, 2485, 2545, 3563, 6035, 8449, 8653, 17815, 36139, 42245, 43265, 60571, 180695, 252973, 302855, 614363, 1264865, 3071815, 4300541, 21502705]

約数ペア:

[(1, 21502705), (5, 4300541), (7, 3071815), (17, 1264865), (35, 614363), (71, 302855), (85, 252973), (119, 180695), (355, 60571), (497, 43265), (509, 42245), (595, 36139), (1207, 17815), (2485, 8653), (2545, 8449), (3563, 6035)]