20756528

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{1367}}^1$

素因数の和:1461

約数の個数: 40

約数和(自身を含む): 43934688

約数和(自身を除く): 23178160

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 73, 104, 146, 208, 292, 584, 949, 1168, 1367, 1898, 2734, 3796, 5468, 7592, 10936, 15184, 17771, 21872, 35542, 71084, 99791, 142168, 199582, 284336, 399164, 798328, 1297283, 1596656, 2594566, 5189132, 10378264, 20756528]

約数ペア:

[(1, 20756528), (2, 10378264), (4, 5189132), (8, 2594566), (13, 1596656), (16, 1297283), (26, 798328), (52, 399164), (73, 284336), (104, 199582), (146, 142168), (208, 99791), (292, 71084), (584, 35542), (949, 21872), (1168, 17771), (1367, 15184), (1898, 10936), (2734, 7592), (3796, 5468)]