161720

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{311}}^1$

素因数の和:335

約数の個数: 32

約数和(自身を含む): 393120

約数和(自身を除く): 231400

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 311, 520, 622, 1244, 1555, 2488, 3110, 4043, 6220, 8086, 12440, 16172, 20215, 32344, 40430, 80860, 161720]

約数ペア:

[(1, 161720), (2, 80860), (4, 40430), (5, 32344), (8, 20215), (10, 16172), (13, 12440), (20, 8086), (26, 6220), (40, 4043), (52, 3110), (65, 2488), (104, 1555), (130, 1244), (260, 622), (311, 520)]