21046120

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^2\times {\mathrm{313}}^1$

素因数の和:406

約数の個数: 48

約数和(自身を含む): 48691980

約数和(自身を除く): 27645860

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 313, 328, 410, 626, 820, 1252, 1565, 1640, 1681, 2504, 3130, 3362, 6260, 6724, 8405, 12520, 12833, 13448, 16810, 25666, 33620, 51332, 64165, 67240, 102664, 128330, 256660, 513320, 526153, 1052306, 2104612, 2630765, 4209224, 5261530, 10523060, 21046120]

約数ペア:

[(1, 21046120), (2, 10523060), (4, 5261530), (5, 4209224), (8, 2630765), (10, 2104612), (20, 1052306), (40, 526153), (41, 513320), (82, 256660), (164, 128330), (205, 102664), (313, 67240), (328, 64165), (410, 51332), (626, 33620), (820, 25666), (1252, 16810), (1565, 13448), (1640, 12833), (1681, 12520), (2504, 8405), (3130, 6724), (3362, 6260)]