20452640

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{9833}}^1$

素因数の和:9861

約数の個数: 48

約数和(自身を含む): 52041528

約数和(自身を除く): 31588888

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 80, 104, 130, 160, 208, 260, 416, 520, 1040, 2080, 9833, 19666, 39332, 49165, 78664, 98330, 127829, 157328, 196660, 255658, 314656, 393320, 511316, 639145, 786640, 1022632, 1278290, 1573280, 2045264, 2556580, 4090528, 5113160, 10226320, 20452640]

約数ペア:

[(1, 20452640), (2, 10226320), (4, 5113160), (5, 4090528), (8, 2556580), (10, 2045264), (13, 1573280), (16, 1278290), (20, 1022632), (26, 786640), (32, 639145), (40, 511316), (52, 393320), (65, 314656), (80, 255658), (104, 196660), (130, 157328), (160, 127829), (208, 98330), (260, 78664), (416, 49165), (520, 39332), (1040, 19666), (2080, 9833)]