19991312

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{97}}^1\times {\mathrm{1171}}^1$

素因数の和:1287

約数の個数: 40

約数和(自身を含む): 42726432

約数和(自身を除く): 22735120

約数列:

[1, 2, 4, 8, 11, 16, 22, 44, 88, 97, 176, 194, 388, 776, 1067, 1171, 1552, 2134, 2342, 4268, 4684, 8536, 9368, 12881, 17072, 18736, 25762, 51524, 103048, 113587, 206096, 227174, 454348, 908696, 1249457, 1817392, 2498914, 4997828, 9995656, 19991312]

約数ペア:

[(1, 19991312), (2, 9995656), (4, 4997828), (8, 2498914), (11, 1817392), (16, 1249457), (22, 908696), (44, 454348), (88, 227174), (97, 206096), (176, 113587), (194, 103048), (388, 51524), (776, 25762), (1067, 18736), (1171, 17072), (1552, 12881), (2134, 9368), (2342, 8536), (4268, 4684)]