18900080

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{7621}}^1$

素因数の和:7665

約数の個数: 40

約数和(自身を含む): 45366144

約数和(自身を除く): 26466064

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 7621, 15242, 30484, 38105, 60968, 76210, 121936, 152420, 236251, 304840, 472502, 609680, 945004, 1181255, 1890008, 2362510, 3780016, 4725020, 9450040, 18900080]

約数ペア:

[(1, 18900080), (2, 9450040), (4, 4725020), (5, 3780016), (8, 2362510), (10, 1890008), (16, 1181255), (20, 945004), (31, 609680), (40, 472502), (62, 304840), (80, 236251), (124, 152420), (155, 121936), (248, 76210), (310, 60968), (496, 38105), (620, 30484), (1240, 15242), (2480, 7621)]