21215648

素因数分解:

$2^5\times {\mathrm{409}}^1\times {\mathrm{1621}}^1$

素因数の和:2040

約数の個数: 24

約数和(自身を含む): 41896260

約数和(自身を除く): 20680612

約数列:

[1, 2, 4, 8, 16, 32, 409, 818, 1621, 1636, 3242, 3272, 6484, 6544, 12968, 13088, 25936, 51872, 662989, 1325978, 2651956, 5303912, 10607824, 21215648]

約数ペア:

[(1, 21215648), (2, 10607824), (4, 5303912), (8, 2651956), (16, 1325978), (32, 662989), (409, 51872), (818, 25936), (1621, 13088), (1636, 12968), (3242, 6544), (3272, 6484)]