256489720

素因数分解:

$2^3\times 5^1\times {\mathrm{373}}^1\times {\mathrm{17191}}^1$

素因数の和:17575

約数の個数: 32

約数和(自身を含む): 578682720

約数和(自身を除く): 322193000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 373, 746, 1492, 1865, 2984, 3730, 7460, 14920, 17191, 34382, 68764, 85955, 137528, 171910, 343820, 687640, 6412243, 12824486, 25648972, 32061215, 51297944, 64122430, 128244860, 256489720]

約数ペア:

[(1, 256489720), (2, 128244860), (4, 64122430), (5, 51297944), (8, 32061215), (10, 25648972), (20, 12824486), (40, 6412243), (373, 687640), (746, 343820), (1492, 171910), (1865, 137528), (2984, 85955), (3730, 68764), (7460, 34382), (14920, 17191)]