19990850

素因数分解:

$2^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{1913}}^1$

素因数の和:1955

約数の個数: 48

約数和(自身を含む): 42720480

約数和(自身を除く): 22729630

約数列:

[1, 2, 5, 10, 11, 19, 22, 25, 38, 50, 55, 95, 110, 190, 209, 275, 418, 475, 550, 950, 1045, 1913, 2090, 3826, 5225, 9565, 10450, 19130, 21043, 36347, 42086, 47825, 72694, 95650, 105215, 181735, 210430, 363470, 399817, 526075, 799634, 908675, 1052150, 1817350, 1999085, 3998170, 9995425, 19990850]

約数ペア:

[(1, 19990850), (2, 9995425), (5, 3998170), (10, 1999085), (11, 1817350), (19, 1052150), (22, 908675), (25, 799634), (38, 526075), (50, 399817), (55, 363470), (95, 210430), (110, 181735), (190, 105215), (209, 95650), (275, 72694), (418, 47825), (475, 42086), (550, 36347), (950, 21043), (1045, 19130), (1913, 10450), (2090, 9565), (3826, 5225)]