18936520

素因数分解:

$2^3\times 5^1\times {\mathrm{389}}^1\times {\mathrm{1217}}^1$

素因数の和:1617

約数の個数: 32

約数和(自身を含む): 42751800

約数和(自身を除く): 23815280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 389, 778, 1217, 1556, 1945, 2434, 3112, 3890, 4868, 6085, 7780, 9736, 12170, 15560, 24340, 48680, 473413, 946826, 1893652, 2367065, 3787304, 4734130, 9468260, 18936520]

約数ペア:

[(1, 18936520), (2, 9468260), (4, 4734130), (5, 3787304), (8, 2367065), (10, 1893652), (20, 946826), (40, 473413), (389, 48680), (778, 24340), (1217, 15560), (1556, 12170), (1945, 9736), (2434, 7780), (3112, 6085), (3890, 4868)]