20181248

素因数分解:

$2^8\times {\mathrm{31}}^1\times {\mathrm{2543}}^1$

素因数の和:2590

約数の個数: 36

約数和(自身を含む): 41599488

約数和(自身を除く): 21418240

約数列:

[1, 2, 4, 8, 16, 31, 32, 62, 64, 124, 128, 248, 256, 496, 992, 1984, 2543, 3968, 5086, 7936, 10172, 20344, 40688, 78833, 81376, 157666, 162752, 315332, 325504, 630664, 651008, 1261328, 2522656, 5045312, 10090624, 20181248]

約数ペア:

[(1, 20181248), (2, 10090624), (4, 5045312), (8, 2522656), (16, 1261328), (31, 651008), (32, 630664), (62, 325504), (64, 315332), (124, 162752), (128, 157666), (248, 81376), (256, 78833), (496, 40688), (992, 20344), (1984, 10172), (2543, 7936), (3968, 5086)]