21057296

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{1511}}^1$

素因数の和:1599

約数の個数: 40

約数和(自身を含む): 44622144

約数和(自身を除く): 23564848

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 67, 104, 134, 208, 268, 536, 871, 1072, 1511, 1742, 3022, 3484, 6044, 6968, 12088, 13936, 19643, 24176, 39286, 78572, 101237, 157144, 202474, 314288, 404948, 809896, 1316081, 1619792, 2632162, 5264324, 10528648, 21057296]

約数ペア:

[(1, 21057296), (2, 10528648), (4, 5264324), (8, 2632162), (13, 1619792), (16, 1316081), (26, 809896), (52, 404948), (67, 314288), (104, 202474), (134, 157144), (208, 101237), (268, 78572), (536, 39286), (871, 24176), (1072, 19643), (1511, 13936), (1742, 12088), (3022, 6968), (3484, 6044)]