19904170

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{449}}^1$

素因数の和:511

約数の個数: 64

約数和(自身を含む): 43545600

約数和(自身を除く): 23641430

約数列:

[1, 2, 5, 10, 11, 13, 22, 26, 31, 55, 62, 65, 110, 130, 143, 155, 286, 310, 341, 403, 449, 682, 715, 806, 898, 1430, 1705, 2015, 2245, 3410, 4030, 4433, 4490, 4939, 5837, 8866, 9878, 11674, 13919, 22165, 24695, 27838, 29185, 44330, 49390, 58370, 64207, 69595, 128414, 139190, 153109, 180947, 306218, 321035, 361894, 642070, 765545, 904735, 1531090, 1809470, 1990417, 3980834, 9952085, 19904170]

約数ペア:

[(1, 19904170), (2, 9952085), (5, 3980834), (10, 1990417), (11, 1809470), (13, 1531090), (22, 904735), (26, 765545), (31, 642070), (55, 361894), (62, 321035), (65, 306218), (110, 180947), (130, 153109), (143, 139190), (155, 128414), (286, 69595), (310, 64207), (341, 58370), (403, 49390), (449, 44330), (682, 29185), (715, 27838), (806, 24695), (898, 22165), (1430, 13919), (1705, 11674), (2015, 9878), (2245, 8866), (3410, 5837), (4030, 4939), (4433, 4490)]