19980416

素因数分解:

$2^7\times {\mathrm{139}}^1\times {\mathrm{1123}}^1$

素因数の和:1276

約数の個数: 32

約数和(自身を含む): 40126800

約数和(自身を除く): 20146384

約数列:

[1, 2, 4, 8, 16, 32, 64, 128, 139, 278, 556, 1112, 1123, 2224, 2246, 4448, 4492, 8896, 8984, 17792, 17968, 35936, 71872, 143744, 156097, 312194, 624388, 1248776, 2497552, 4995104, 9990208, 19980416]

約数ペア:

[(1, 19980416), (2, 9990208), (4, 4995104), (8, 2497552), (16, 1248776), (32, 624388), (64, 312194), (128, 156097), (139, 143744), (278, 71872), (556, 35936), (1112, 17968), (1123, 17792), (2224, 8984), (2246, 8896), (4448, 4492)]