21335252

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{41}}^2\times {\mathrm{167}}^1$

素因数の和:272

約数の個数: 36

約数和(自身を含む): 40524960

約数和(自身を除く): 19189708

約数列:

[1, 2, 4, 19, 38, 41, 76, 82, 164, 167, 334, 668, 779, 1558, 1681, 3116, 3173, 3362, 6346, 6724, 6847, 12692, 13694, 27388, 31939, 63878, 127756, 130093, 260186, 280727, 520372, 561454, 1122908, 5333813, 10667626, 21335252]

約数ペア:

[(1, 21335252), (2, 10667626), (4, 5333813), (19, 1122908), (38, 561454), (41, 520372), (76, 280727), (82, 260186), (164, 130093), (167, 127756), (334, 63878), (668, 31939), (779, 27388), (1558, 13694), (1681, 12692), (3116, 6847), (3173, 6724), (3362, 6346)]