21891325

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{2711}}^1$

素因数の和:2757

約数の個数: 24

約数和(自身を含む): 30265920

約数和(自身を除く): 8374595

約数列:

[1, 5, 17, 19, 25, 85, 95, 323, 425, 475, 1615, 2711, 8075, 13555, 46087, 51509, 67775, 230435, 257545, 875653, 1152175, 1287725, 4378265, 21891325]

約数ペア:

[(1, 21891325), (5, 4378265), (17, 1287725), (19, 1152175), (25, 875653), (85, 257545), (95, 230435), (323, 67775), (425, 51509), (475, 46087), (1615, 13555), (2711, 8075)]