20731340

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{373}}^1\times {\mathrm{397}}^1$

素因数の和:786

約数の個数: 48

約数和(自身を含む): 50014272

約数和(自身を除く): 29282932

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 373, 397, 746, 794, 1492, 1588, 1865, 1985, 2611, 2779, 3730, 3970, 5222, 5558, 7460, 7940, 10444, 11116, 13055, 13895, 26110, 27790, 52220, 55580, 148081, 296162, 592324, 740405, 1036567, 1480810, 2073134, 2961620, 4146268, 5182835, 10365670, 20731340]

約数ペア:

[(1, 20731340), (2, 10365670), (4, 5182835), (5, 4146268), (7, 2961620), (10, 2073134), (14, 1480810), (20, 1036567), (28, 740405), (35, 592324), (70, 296162), (140, 148081), (373, 55580), (397, 52220), (746, 27790), (794, 26110), (1492, 13895), (1588, 13055), (1865, 11116), (1985, 10444), (2611, 7940), (2779, 7460), (3730, 5558), (3970, 5222)]