21578920

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{49043}}^1$

素因数の和:49065

約数の個数: 32

約数和(自身を含む): 52967520

約数和(自身を除く): 31388600

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 49043, 98086, 196172, 245215, 392344, 490430, 539473, 980860, 1078946, 1961720, 2157892, 2697365, 4315784, 5394730, 10789460, 21578920]

約数ペア:

[(1, 21578920), (2, 10789460), (4, 5394730), (5, 4315784), (8, 2697365), (10, 2157892), (11, 1961720), (20, 1078946), (22, 980860), (40, 539473), (44, 490430), (55, 392344), (88, 245215), (110, 196172), (220, 98086), (440, 49043)]