19909936

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{137}}^1\times {\mathrm{293}}^1$

素因数の和:469

約数の個数: 40

約数和(自身を含む): 40247424

約数和(自身を除く): 20337488

約数列:

[1, 2, 4, 8, 16, 31, 62, 124, 137, 248, 274, 293, 496, 548, 586, 1096, 1172, 2192, 2344, 4247, 4688, 8494, 9083, 16988, 18166, 33976, 36332, 40141, 67952, 72664, 80282, 145328, 160564, 321128, 642256, 1244371, 2488742, 4977484, 9954968, 19909936]

約数ペア:

[(1, 19909936), (2, 9954968), (4, 4977484), (8, 2488742), (16, 1244371), (31, 642256), (62, 321128), (124, 160564), (137, 145328), (248, 80282), (274, 72664), (293, 67952), (496, 40141), (548, 36332), (586, 33976), (1096, 18166), (1172, 16988), (2192, 9083), (2344, 8494), (4247, 4688)]