131311280

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{86389}}^1$

素因数の和:86421

約数の個数: 40

約数和(自身を含む): 321370800

約数和(自身を除く): 190059520

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 86389, 172778, 345556, 431945, 691112, 863890, 1382224, 1641391, 1727780, 3282782, 3455560, 6565564, 6911120, 8206955, 13131128, 16413910, 26262256, 32827820, 65655640, 131311280]

約数ペア:

[(1, 131311280), (2, 65655640), (4, 32827820), (5, 26262256), (8, 16413910), (10, 13131128), (16, 8206955), (19, 6911120), (20, 6565564), (38, 3455560), (40, 3282782), (76, 1727780), (80, 1641391), (95, 1382224), (152, 863890), (190, 691112), (304, 431945), (380, 345556), (760, 172778), (1520, 86389)]