18997615

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{971}}^1$

素因数の和:1039

約数の個数: 32

約数和(自身を含む): 28740096

約数和(自身を除く): 9742481

約数列:

[1, 5, 7, 13, 35, 43, 65, 91, 215, 301, 455, 559, 971, 1505, 2795, 3913, 4855, 6797, 12623, 19565, 33985, 41753, 63115, 88361, 208765, 292271, 441805, 542789, 1461355, 2713945, 3799523, 18997615]

約数ペア:

[(1, 18997615), (5, 3799523), (7, 2713945), (13, 1461355), (35, 542789), (43, 441805), (65, 292271), (91, 208765), (215, 88361), (301, 63115), (455, 41753), (559, 33985), (971, 19565), (1505, 12623), (2795, 6797), (3913, 4855)]