201916520

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{388301}}^1$

素因数の和:388325

約数の個数: 32

約数和(自身を含む): 489260520

約数和(自身を除く): 287344000

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 388301, 776602, 1553204, 1941505, 3106408, 3883010, 5047913, 7766020, 10095826, 15532040, 20191652, 25239565, 40383304, 50479130, 100958260, 201916520]

約数ペア:

[(1, 201916520), (2, 100958260), (4, 50479130), (5, 40383304), (8, 25239565), (10, 20191652), (13, 15532040), (20, 10095826), (26, 7766020), (40, 5047913), (52, 3883010), (65, 3106408), (104, 1941505), (130, 1553204), (260, 776602), (520, 388301)]