21616775

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{2677}}^1$

素因数の和:2723

約数の個数: 24

約数和(自身を含む): 29886480

約数和(自身を除く): 8269705

約数列:

[1, 5, 17, 19, 25, 85, 95, 323, 425, 475, 1615, 2677, 8075, 13385, 45509, 50863, 66925, 227545, 254315, 864671, 1137725, 1271575, 4323355, 21616775]

約数ペア:

[(1, 21616775), (5, 4323355), (17, 1271575), (19, 1137725), (25, 864671), (85, 254315), (95, 227545), (323, 66925), (425, 50863), (475, 45509), (1615, 13385), (2677, 8075)]