21578260

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{2281}}^1$

素因数の和:2344

約数の個数: 48

約数和(自身を含む): 50605632

約数和(自身を除く): 29027372

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 43, 44, 55, 86, 110, 172, 215, 220, 430, 473, 860, 946, 1892, 2281, 2365, 4562, 4730, 9124, 9460, 11405, 22810, 25091, 45620, 50182, 98083, 100364, 125455, 196166, 250910, 392332, 490415, 501820, 980830, 1078913, 1961660, 2157826, 4315652, 5394565, 10789130, 21578260]

約数ペア:

[(1, 21578260), (2, 10789130), (4, 5394565), (5, 4315652), (10, 2157826), (11, 1961660), (20, 1078913), (22, 980830), (43, 501820), (44, 490415), (55, 392332), (86, 250910), (110, 196166), (172, 125455), (215, 100364), (220, 98083), (430, 50182), (473, 45620), (860, 25091), (946, 22810), (1892, 11405), (2281, 9460), (2365, 9124), (4562, 4730)]