81561720

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{679681}}^1$

素因数の和:679695

約数の個数: 32

約数和(自身を含む): 244685520

約数和(自身を除く): 163123800

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 679681, 1359362, 2039043, 2718724, 3398405, 4078086, 5437448, 6796810, 8156172, 10195215, 13593620, 16312344, 20390430, 27187240, 40780860, 81561720]

約数ペア:

[(1, 81561720), (2, 40780860), (3, 27187240), (4, 20390430), (5, 16312344), (6, 13593620), (8, 10195215), (10, 8156172), (12, 6796810), (15, 5437448), (20, 4078086), (24, 3398405), (30, 2718724), (40, 2039043), (60, 1359362), (120, 679681)]