21007460

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^2\times {\mathrm{1093}}^1$

素因数の和:1164

約数の個数: 36

約数和(自身を含む): 45626364

約数和(自身を除く): 24618904

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 961, 1093, 1922, 2186, 3844, 4372, 4805, 5465, 9610, 10930, 19220, 21860, 33883, 67766, 135532, 169415, 338830, 677660, 1050373, 2100746, 4201492, 5251865, 10503730, 21007460]

約数ペア:

[(1, 21007460), (2, 10503730), (4, 5251865), (5, 4201492), (10, 2100746), (20, 1050373), (31, 677660), (62, 338830), (124, 169415), (155, 135532), (310, 67766), (620, 33883), (961, 21860), (1093, 19220), (1922, 10930), (2186, 9610), (3844, 5465), (4372, 4805)]