21807968

素因数分解:

$2^5\times 7^1\times {\mathrm{13}}^1\times {\mathrm{7489}}^1$

素因数の和:7519

約数の個数: 48

約数和(自身を含む): 52849440

約数和(自身を除く): 31041472

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 32, 52, 56, 91, 104, 112, 182, 208, 224, 364, 416, 728, 1456, 2912, 7489, 14978, 29956, 52423, 59912, 97357, 104846, 119824, 194714, 209692, 239648, 389428, 419384, 681499, 778856, 838768, 1362998, 1557712, 1677536, 2725996, 3115424, 5451992, 10903984, 21807968]

約数ペア:

[(1, 21807968), (2, 10903984), (4, 5451992), (7, 3115424), (8, 2725996), (13, 1677536), (14, 1557712), (16, 1362998), (26, 838768), (28, 778856), (32, 681499), (52, 419384), (56, 389428), (91, 239648), (104, 209692), (112, 194714), (182, 119824), (208, 104846), (224, 97357), (364, 59912), (416, 52423), (728, 29956), (1456, 14978), (2912, 7489)]