21209656

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{1871}}^1$

素因数の和:1999

約数の個数: 32

約数和(自身を含む): 43243200

約数和(自身を除く): 22033544

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 109, 218, 436, 872, 1417, 1871, 2834, 3742, 5668, 7484, 11336, 14968, 24323, 48646, 97292, 194584, 203939, 407878, 815756, 1631512, 2651207, 5302414, 10604828, 21209656]

約数ペア:

[(1, 21209656), (2, 10604828), (4, 5302414), (8, 2651207), (13, 1631512), (26, 815756), (52, 407878), (104, 203939), (109, 194584), (218, 97292), (436, 48646), (872, 24323), (1417, 14968), (1871, 11336), (2834, 7484), (3742, 5668)]