81682120

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{157081}}^1$

素因数の和:157105

約数の個数: 32

約数和(自身を含む): 197923320

約数和(自身を除く): 116241200

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 157081, 314162, 628324, 785405, 1256648, 1570810, 2042053, 3141620, 4084106, 6283240, 8168212, 10210265, 16336424, 20420530, 40841060, 81682120]

約数ペア:

[(1, 81682120), (2, 40841060), (4, 20420530), (5, 16336424), (8, 10210265), (10, 8168212), (13, 6283240), (20, 4084106), (26, 3141620), (40, 2042053), (52, 1570810), (65, 1256648), (104, 785405), (130, 628324), (260, 314162), (520, 157081)]