20390890

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{101}}^1\times {\mathrm{1553}}^1$

素因数の和:1674

約数の個数: 32

約数和(自身を含む): 39944016

約数和(自身を除く): 19553126

約数列:

[1, 2, 5, 10, 13, 26, 65, 101, 130, 202, 505, 1010, 1313, 1553, 2626, 3106, 6565, 7765, 13130, 15530, 20189, 40378, 100945, 156853, 201890, 313706, 784265, 1568530, 2039089, 4078178, 10195445, 20390890]

約数ペア:

[(1, 20390890), (2, 10195445), (5, 4078178), (10, 2039089), (13, 1568530), (26, 784265), (65, 313706), (101, 201890), (130, 156853), (202, 100945), (505, 40378), (1010, 20189), (1313, 15530), (1553, 13130), (2626, 7765), (3106, 6565)]