19815820

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^2\times {\mathrm{1031}}^1$

素因数の和:1102

約数の個数: 36

約数和(自身を含む): 43040592

約数和(自身を除く): 23224772

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 961, 1031, 1922, 2062, 3844, 4124, 4805, 5155, 9610, 10310, 19220, 20620, 31961, 63922, 127844, 159805, 319610, 639220, 990791, 1981582, 3963164, 4953955, 9907910, 19815820]

約数ペア:

[(1, 19815820), (2, 9907910), (4, 4953955), (5, 3963164), (10, 1981582), (20, 990791), (31, 639220), (62, 319610), (124, 159805), (155, 127844), (310, 63922), (620, 31961), (961, 20620), (1031, 19220), (1922, 10310), (2062, 9610), (3844, 5155), (4124, 4805)]