81747589

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{1489}}^1$

素因数の和:1561

約数の個数: 32

約数和(自身を含む): 109854720

約数和(自身を除く): 28107131

約数列:

[1, 7, 11, 23, 31, 77, 161, 217, 253, 341, 713, 1489, 1771, 2387, 4991, 7843, 10423, 16379, 34247, 46159, 54901, 114653, 239729, 323113, 376717, 507749, 1061657, 2637019, 3554243, 7431599, 11678227, 81747589]

約数ペア:

[(1, 81747589), (7, 11678227), (11, 7431599), (23, 3554243), (31, 2637019), (77, 1061657), (161, 507749), (217, 376717), (253, 323113), (341, 239729), (713, 114653), (1489, 54901), (1771, 46159), (2387, 34247), (4991, 16379), (7843, 10423)]