21780484

素因数分解:

$2^2\times {\mathrm{11}}^3\times {\mathrm{4091}}^1$

素因数の和:4128

約数の個数: 24

約数和(自身を含む): 41934816

約数和(自身を除く): 20154332

約数列:

[1, 2, 4, 11, 22, 44, 121, 242, 484, 1331, 2662, 4091, 5324, 8182, 16364, 45001, 90002, 180004, 495011, 990022, 1980044, 5445121, 10890242, 21780484]

約数ペア:

[(1, 21780484), (2, 10890242), (4, 5445121), (11, 1980044), (22, 990022), (44, 495011), (121, 180004), (242, 90002), (484, 45001), (1331, 16364), (2662, 8182), (4091, 5324)]