21870316

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{9781}}^1$

素因数の和:9841

約数の個数: 24

約数和(自身を含む): 42179984

約数和(自身を除く): 20309668

約数列:

[1, 2, 4, 13, 26, 43, 52, 86, 172, 559, 1118, 2236, 9781, 19562, 39124, 127153, 254306, 420583, 508612, 841166, 1682332, 5467579, 10935158, 21870316]

約数ペア:

[(1, 21870316), (2, 10935158), (4, 5467579), (13, 1682332), (26, 841166), (43, 508612), (52, 420583), (86, 254306), (172, 127153), (559, 39124), (1118, 19562), (2236, 9781)]