131420720

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{86461}}^1$

素因数の和:86493

約数の個数: 40

約数和(自身を含む): 321638640

約数和(自身を除く): 190217920

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 86461, 172922, 345844, 432305, 691688, 864610, 1383376, 1642759, 1729220, 3285518, 3458440, 6571036, 6916880, 8213795, 13142072, 16427590, 26284144, 32855180, 65710360, 131420720]

約数ペア:

[(1, 131420720), (2, 65710360), (4, 32855180), (5, 26284144), (8, 16427590), (10, 13142072), (16, 8213795), (19, 6916880), (20, 6571036), (38, 3458440), (40, 3285518), (76, 1729220), (80, 1642759), (95, 1383376), (152, 864610), (190, 691688), (304, 432305), (380, 345844), (760, 172922), (1520, 86461)]