21905290

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{223}}^1$

素因数の和:307

約数の個数: 64

約数和(自身を含む): 46448640

約数和(自身を除く): 24543350

約数列:

[1, 2, 5, 10, 11, 19, 22, 38, 47, 55, 94, 95, 110, 190, 209, 223, 235, 418, 446, 470, 517, 893, 1034, 1045, 1115, 1786, 2090, 2230, 2453, 2585, 4237, 4465, 4906, 5170, 8474, 8930, 9823, 10481, 12265, 19646, 20962, 21185, 24530, 42370, 46607, 49115, 52405, 93214, 98230, 104810, 115291, 199139, 230582, 233035, 398278, 466070, 576455, 995695, 1152910, 1991390, 2190529, 4381058, 10952645, 21905290]

約数ペア:

[(1, 21905290), (2, 10952645), (5, 4381058), (10, 2190529), (11, 1991390), (19, 1152910), (22, 995695), (38, 576455), (47, 466070), (55, 398278), (94, 233035), (95, 230582), (110, 199139), (190, 115291), (209, 104810), (223, 98230), (235, 93214), (418, 52405), (446, 49115), (470, 46607), (517, 42370), (893, 24530), (1034, 21185), (1045, 20962), (1115, 19646), (1786, 12265), (2090, 10481), (2230, 9823), (2453, 8930), (2585, 8474), (4237, 5170), (4465, 4906)]