19991536

素因数分解:

$2^4\times {\mathrm{89}}^1\times {\mathrm{101}}^1\times {\mathrm{139}}^1$

素因数の和:337

約数の個数: 40

約数和(自身を含む): 39841200

約数和(自身を除く): 19849664

約数列:

[1, 2, 4, 8, 16, 89, 101, 139, 178, 202, 278, 356, 404, 556, 712, 808, 1112, 1424, 1616, 2224, 8989, 12371, 14039, 17978, 24742, 28078, 35956, 49484, 56156, 71912, 98968, 112312, 143824, 197936, 224624, 1249471, 2498942, 4997884, 9995768, 19991536]

約数ペア:

[(1, 19991536), (2, 9995768), (4, 4997884), (8, 2498942), (16, 1249471), (89, 224624), (101, 197936), (139, 143824), (178, 112312), (202, 98968), (278, 71912), (356, 56156), (404, 49484), (556, 35956), (712, 28078), (808, 24742), (1112, 17978), (1424, 14039), (1616, 12371), (2224, 8989)]